diff --git a/doc/pub/week38/html/._week38-bs000.html b/doc/pub/week38/html/._week38-bs000.html
index 61eeb4204..e21842184 100644
--- a/doc/pub/week38/html/._week38-bs000.html
+++ b/doc/pub/week38/html/._week38-bs000.html
@@ -320,7 +320,7 @@ MathJax.Hub.Config({
 </center>
 <br>
 <center>
-<h4>Week 38</h4>
+<h4>September 18-24</h4>
 </center> <!-- date -->
 <br>
 
diff --git a/doc/pub/week38/html/week38-bs.html b/doc/pub/week38/html/week38-bs.html
index 61eeb4204..e21842184 100644
--- a/doc/pub/week38/html/week38-bs.html
+++ b/doc/pub/week38/html/week38-bs.html
@@ -320,7 +320,7 @@ MathJax.Hub.Config({
 </center>
 <br>
 <center>
-<h4>Week 38</h4>
+<h4>September 18-24</h4>
 </center> <!-- date -->
 <br>
 
diff --git a/doc/pub/week38/html/week38-reveal.html b/doc/pub/week38/html/week38-reveal.html
index 6a35f3028..7d3e683f7 100644
--- a/doc/pub/week38/html/week38-reveal.html
+++ b/doc/pub/week38/html/week38-reveal.html
@@ -184,7 +184,7 @@ MathJax.Hub.Config({
 </center>
 <br>
 <center>
-<h4>Week 38</h4>
+<h4>September 18-24</h4>
 </center> <!-- date -->
 <br>
 
diff --git a/doc/pub/week38/html/week38-solarized.html b/doc/pub/week38/html/week38-solarized.html
index fe26ee152..1ea9a32dd 100644
--- a/doc/pub/week38/html/week38-solarized.html
+++ b/doc/pub/week38/html/week38-solarized.html
@@ -260,7 +260,7 @@ MathJax.Hub.Config({
 </center>
 <br>
 <center>
-<h4>Week 38</h4>
+<h4>September 18-24</h4>
 </center> <!-- date -->
 <br>
 
diff --git a/doc/pub/week38/html/week38.html b/doc/pub/week38/html/week38.html
index 98139a3cf..aa5793bc5 100644
--- a/doc/pub/week38/html/week38.html
+++ b/doc/pub/week38/html/week38.html
@@ -337,7 +337,7 @@ MathJax.Hub.Config({
 </center>
 <br>
 <center>
-<h4>Week 38</h4>
+<h4>September 18-24</h4>
 </center> <!-- date -->
 <br>
 
diff --git a/doc/pub/week38/ipynb/ipynb-week38-src.tar.gz b/doc/pub/week38/ipynb/ipynb-week38-src.tar.gz
index 9aadccc30..a7b30c070 100644
Binary files a/doc/pub/week38/ipynb/ipynb-week38-src.tar.gz and b/doc/pub/week38/ipynb/ipynb-week38-src.tar.gz differ
diff --git a/doc/pub/week38/ipynb/week38.ipynb b/doc/pub/week38/ipynb/week38.ipynb
index cdbf2529a..282dca7ed 100644
--- a/doc/pub/week38/ipynb/week38.ipynb
+++ b/doc/pub/week38/ipynb/week38.ipynb
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "5ec77d95",
+   "id": "ec7cd003",
    "metadata": {
     "editable": true
    },
@@ -14,7 +14,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "cc084164",
+   "id": "7f3d7e96",
    "metadata": {
     "editable": true
    },
@@ -22,12 +22,12 @@
     "# Data Analysis and Machine Learning: Logistic Regression and Optimization\n",
     "**Morten Hjorth-Jensen**, Department of Physics and Center for Computing in Science Education, University of Oslo and Department of Physics and Astronomy and Facility for Rare Isotope Beams, Michigan State University\n",
     "\n",
-    "Date: **Week 38**"
+    "Date: **September 18-24**"
    ]
   },
   {
    "cell_type": "markdown",
-   "id": "8bc0fe6f",
+   "id": "cc8063e0",
    "metadata": {
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@@ -51,7 +51,7 @@
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   {
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+   "id": "00e5a3ff",
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@@ -64,7 +64,7 @@
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   {
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+   "id": "d355e794",
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@@ -76,7 +76,7 @@
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   {
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-   "id": "f2bd1b6f",
+   "id": "aa07e273",
    "metadata": {
     "editable": true
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@@ -86,7 +86,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "10c8f594",
+   "id": "c785a26c",
    "metadata": {
     "editable": true
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@@ -99,7 +99,7 @@
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   {
    "cell_type": "markdown",
-   "id": "2f1ac29b",
+   "id": "8a505e69",
    "metadata": {
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@@ -109,7 +109,7 @@
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   {
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-   "id": "e3cc817d",
+   "id": "1903c98d",
    "metadata": {
     "editable": true
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@@ -121,7 +121,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2ec53646",
+   "id": "eff19c50",
    "metadata": {
     "editable": true
    },
@@ -134,7 +134,7 @@
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   {
    "cell_type": "markdown",
-   "id": "474ad553",
+   "id": "1fea1c4f",
    "metadata": {
     "editable": true
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@@ -147,7 +147,7 @@
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   {
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-   "id": "09d5714d",
+   "id": "ecb30043",
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@@ -159,7 +159,7 @@
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   {
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-   "id": "bf9b3d8d",
+   "id": "5c346255",
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@@ -171,7 +171,7 @@
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+   "id": "4c80789e",
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@@ -181,7 +181,7 @@
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@@ -194,7 +194,7 @@
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+   "id": "978b9f12",
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@@ -206,7 +206,7 @@
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   {
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     "editable": true
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@@ -218,7 +218,7 @@
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   {
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-   "id": "912f0884",
+   "id": "7006a23d",
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@@ -243,7 +243,7 @@
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-   "id": "4f8dc4fd",
+   "id": "b652bdb7",
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     "editable": true
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@@ -259,7 +259,7 @@
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   {
    "cell_type": "markdown",
-   "id": "1a6aee99",
+   "id": "9e9221f4",
    "metadata": {
     "editable": true
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@@ -275,7 +275,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "00665a2c",
+   "id": "6e3b84f0",
    "metadata": {
     "editable": true
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@@ -289,7 +289,7 @@
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-   "id": "38420361",
+   "id": "01ed063e",
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@@ -317,7 +317,7 @@
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-   "id": "0bfb4c13",
+   "id": "3b935a84",
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@@ -330,7 +330,7 @@
   {
    "cell_type": "code",
    "execution_count": 1,
-   "id": "7842d4cd",
+   "id": "8dd2fca6",
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     "editable": true
@@ -432,7 +432,7 @@
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+   "id": "637798a2",
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@@ -454,7 +454,7 @@
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   {
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-   "id": "5cba697b",
+   "id": "cbe88211",
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@@ -480,7 +480,7 @@
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   {
    "cell_type": "markdown",
-   "id": "e1b1c382",
+   "id": "fc1c947f",
    "metadata": {
     "editable": true
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@@ -504,7 +504,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "09a689c0",
+   "id": "99e56eb8",
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@@ -529,7 +529,7 @@
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-   "id": "230d1777",
+   "id": "39be74f3",
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@@ -541,7 +541,7 @@
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   {
    "cell_type": "markdown",
-   "id": "4743dd02",
+   "id": "7aa89ad0",
    "metadata": {
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@@ -559,7 +559,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "30c08622",
+   "id": "9eed50b8",
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@@ -577,7 +577,7 @@
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+   "id": "fd8ab2ec",
    "metadata": {
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@@ -588,7 +588,7 @@
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-   "id": "28181bae",
+   "id": "b570bdbe",
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     "editable": true
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@@ -615,7 +615,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "79cd1f39",
+   "id": "386e4859",
    "metadata": {
     "editable": true
    },
@@ -628,7 +628,7 @@
   {
    "cell_type": "code",
    "execution_count": 2,
-   "id": "2e448b6d",
+   "id": "8b48f540",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -693,7 +693,7 @@
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   {
    "cell_type": "markdown",
-   "id": "4b074c15",
+   "id": "9d76c1d7",
    "metadata": {
     "editable": true
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@@ -706,7 +706,7 @@
   {
    "cell_type": "code",
    "execution_count": 3,
-   "id": "b9fb8368",
+   "id": "a68657ff",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -725,7 +725,7 @@
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   {
    "cell_type": "markdown",
-   "id": "7e8c2405",
+   "id": "070e4372",
    "metadata": {
     "editable": true
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@@ -736,7 +736,7 @@
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   {
    "cell_type": "markdown",
-   "id": "7b9be3cb",
+   "id": "d46dbebb",
    "metadata": {
     "editable": true
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@@ -748,7 +748,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "240ae804",
+   "id": "d8a67436",
    "metadata": {
     "editable": true
    },
@@ -767,7 +767,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e87757ab",
+   "id": "82a02024",
    "metadata": {
     "editable": true
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@@ -789,7 +789,7 @@
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   {
    "cell_type": "markdown",
-   "id": "37a93eda",
+   "id": "0ccdcb96",
    "metadata": {
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@@ -801,7 +801,7 @@
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   {
    "cell_type": "markdown",
-   "id": "9bcfa679",
+   "id": "40f691cc",
    "metadata": {
     "editable": true
    },
@@ -811,7 +811,7 @@
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   {
    "cell_type": "markdown",
-   "id": "9db93373",
+   "id": "2f4ad520",
    "metadata": {
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@@ -824,7 +824,7 @@
   {
    "cell_type": "code",
    "execution_count": 4,
-   "id": "76dd9b3f",
+   "id": "4b782f83",
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     "editable": true
@@ -889,7 +889,7 @@
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   {
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-   "id": "fb7efd01",
+   "id": "b2e33955",
    "metadata": {
     "editable": true
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@@ -901,7 +901,7 @@
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   {
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-   "id": "61c48fb7",
+   "id": "28928ebf",
    "metadata": {
     "editable": true
    },
@@ -916,7 +916,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f98365b5",
+   "id": "61df3095",
    "metadata": {
     "editable": true
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@@ -928,7 +928,7 @@
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   {
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-   "id": "2d6c988b",
+   "id": "6e2c55ee",
    "metadata": {
     "editable": true
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@@ -940,7 +940,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ccba9a87",
+   "id": "dd8cdb56",
    "metadata": {
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@@ -957,7 +957,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "97d143c5",
+   "id": "23246285",
    "metadata": {
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@@ -971,7 +971,7 @@
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+   "id": "d258a5a3",
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@@ -981,7 +981,7 @@
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   {
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-   "id": "ab5a23d8",
+   "id": "9b80389c",
    "metadata": {
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@@ -993,7 +993,7 @@
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   {
    "cell_type": "markdown",
-   "id": "962b8212",
+   "id": "7d65a46e",
    "metadata": {
     "editable": true
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@@ -1005,7 +1005,7 @@
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   {
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-   "id": "7c8d16ac",
+   "id": "b208d600",
    "metadata": {
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@@ -1017,7 +1017,7 @@
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-   "id": "8024ac37",
+   "id": "3dc20893",
    "metadata": {
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@@ -1028,7 +1028,7 @@
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-   "id": "1310d581",
+   "id": "05d3f7d0",
    "metadata": {
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@@ -1040,7 +1040,7 @@
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@@ -1051,7 +1051,7 @@
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+   "id": "6455785a",
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@@ -1067,7 +1067,7 @@
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+   "id": "2bae3d8c",
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@@ -1079,7 +1079,7 @@
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   {
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+   "id": "5ebcd0c9",
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@@ -1089,7 +1089,7 @@
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@@ -1101,7 +1101,7 @@
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@@ -1116,7 +1116,7 @@
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@@ -1128,7 +1128,7 @@
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@@ -1139,7 +1139,7 @@
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@@ -1151,7 +1151,7 @@
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@@ -1163,7 +1163,7 @@
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+   "id": "c46c8b74",
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@@ -1175,7 +1175,7 @@
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@@ -1185,7 +1185,7 @@
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+   "id": "3b2769d7",
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@@ -1197,7 +1197,7 @@
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@@ -1211,7 +1211,7 @@
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@@ -1223,7 +1223,7 @@
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@@ -1233,7 +1233,7 @@
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@@ -1245,7 +1245,7 @@
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@@ -1255,7 +1255,7 @@
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@@ -1267,7 +1267,7 @@
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@@ -1278,7 +1278,7 @@
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@@ -1301,7 +1301,7 @@
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@@ -1313,7 +1313,7 @@
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@@ -1323,7 +1323,7 @@
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@@ -1335,7 +1335,7 @@
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@@ -1352,7 +1352,7 @@
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@@ -1362,7 +1362,7 @@
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@@ -1381,7 +1381,7 @@
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@@ -1436,7 +1436,7 @@
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@@ -1448,7 +1448,7 @@
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@@ -1463,7 +1463,7 @@
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-   "id": "4c69e9dc",
+   "id": "a5a23a2e",
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     "editable": true
@@ -1516,7 +1516,7 @@
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   {
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-   "id": "dd0cd3ad",
+   "id": "00aa55fe",
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@@ -1531,7 +1531,7 @@
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   {
    "cell_type": "markdown",
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+   "id": "25547b24",
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@@ -1551,7 +1551,7 @@
   {
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    "execution_count": 7,
-   "id": "b4be930d",
+   "id": "32f47a3f",
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     "editable": true
@@ -1605,7 +1605,7 @@
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   {
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+   "id": "8fef3c65",
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@@ -1620,7 +1620,7 @@
   {
    "cell_type": "code",
    "execution_count": 8,
-   "id": "97b937b7",
+   "id": "e7fa4771",
    "metadata": {
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     "editable": true
@@ -1647,7 +1647,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "668bb5b8",
+   "id": "31b8b9d7",
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@@ -1661,7 +1661,7 @@
   {
    "cell_type": "code",
    "execution_count": 9,
-   "id": "fe2b33ed",
+   "id": "65b0eb62",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1706,7 +1706,7 @@
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   {
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+   "id": "a990e432",
    "metadata": {
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@@ -1731,7 +1731,7 @@
   {
    "cell_type": "code",
    "execution_count": 10,
-   "id": "03342bf9",
+   "id": "3cff974e",
    "metadata": {
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     "editable": true
@@ -1743,7 +1743,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c434cb03",
+   "id": "35af988c",
    "metadata": {
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@@ -1754,7 +1754,7 @@
   {
    "cell_type": "code",
    "execution_count": 11,
-   "id": "943f12e6",
+   "id": "d8ee2a26",
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     "editable": true
@@ -1766,7 +1766,7 @@
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   {
    "cell_type": "markdown",
-   "id": "a629015e",
+   "id": "5083b100",
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@@ -1779,7 +1779,7 @@
   },
   {
    "cell_type": "markdown",
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+   "id": "6dca81a1",
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@@ -1790,7 +1790,7 @@
   {
    "cell_type": "code",
    "execution_count": 12,
-   "id": "eb526ffc",
+   "id": "1831a9fc",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1833,7 +1833,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "19d41348",
+   "id": "47cc993d",
    "metadata": {
     "editable": true
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@@ -1854,7 +1854,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d878c937",
+   "id": "cb59521f",
    "metadata": {
     "editable": true
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@@ -1871,7 +1871,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a36bbac2",
+   "id": "4b83405d",
    "metadata": {
     "editable": true
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@@ -1886,7 +1886,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bfdd6975",
+   "id": "7124d0db",
    "metadata": {
     "editable": true
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@@ -1896,7 +1896,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9027a5e4",
+   "id": "56066095",
    "metadata": {
     "editable": true
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@@ -1912,7 +1912,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "318b0b90",
+   "id": "144ea181",
    "metadata": {
     "editable": true
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@@ -1924,7 +1924,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b8733a02",
+   "id": "e2e3b551",
    "metadata": {
     "editable": true
    },
@@ -1935,7 +1935,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4fe83f2a",
+   "id": "9f49c52a",
    "metadata": {
     "editable": true
    },
@@ -1947,7 +1947,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0c7c75fd",
+   "id": "94eafe79",
    "metadata": {
     "editable": true
    },
@@ -1957,7 +1957,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "dd357352",
+   "id": "2fa3c192",
    "metadata": {
     "editable": true
    },
@@ -1971,7 +1971,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5f28887e",
+   "id": "04efdf25",
    "metadata": {
     "editable": true
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@@ -1983,7 +1983,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "83bfdb4d",
+   "id": "00e526a7",
    "metadata": {
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    },
@@ -1993,7 +1993,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "fccb484b",
+   "id": "e5fefee8",
    "metadata": {
     "editable": true
    },
@@ -2005,7 +2005,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "aa7b3418",
+   "id": "a4451761",
    "metadata": {
     "editable": true
    },
@@ -2017,7 +2017,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ca614390",
+   "id": "4ad45d61",
    "metadata": {
     "editable": true
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@@ -2037,7 +2037,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5cb455c4",
+   "id": "e4eaa299",
    "metadata": {
     "editable": true
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@@ -2053,7 +2053,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0b436375",
+   "id": "93d2d556",
    "metadata": {
     "editable": true
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@@ -2069,7 +2069,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "98ad5dca",
+   "id": "09f190c7",
    "metadata": {
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@@ -2080,7 +2080,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "055e33a4",
+   "id": "98d49e4c",
    "metadata": {
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@@ -2092,7 +2092,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "aa5cba6f",
+   "id": "1283f1e0",
    "metadata": {
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@@ -2102,7 +2102,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "359e1737",
+   "id": "fc626a6c",
    "metadata": {
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@@ -2114,7 +2114,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "760fd394",
+   "id": "7c18b2ee",
    "metadata": {
     "editable": true
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@@ -2124,7 +2124,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "dc9e1e35",
+   "id": "e952a0b0",
    "metadata": {
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@@ -2136,7 +2136,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6a90ea0a",
+   "id": "eff35e19",
    "metadata": {
     "editable": true
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@@ -2158,7 +2158,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "54ef0fd0",
+   "id": "b344e24b",
    "metadata": {
     "editable": true
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@@ -2171,7 +2171,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6aa251cc",
+   "id": "ddda0a5e",
    "metadata": {
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@@ -2184,7 +2184,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "84ee4a32",
+   "id": "9e91622a",
    "metadata": {
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@@ -2194,7 +2194,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "444fc1c9",
+   "id": "a9d5d940",
    "metadata": {
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@@ -2212,7 +2212,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a13a9796",
+   "id": "7de9eff3",
    "metadata": {
     "editable": true
    },
@@ -2222,7 +2222,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9853de9e",
+   "id": "5989bfbe",
    "metadata": {
     "editable": true
    },
@@ -2237,7 +2237,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f233f7de",
+   "id": "5c2ca898",
    "metadata": {
     "editable": true
    },
@@ -2247,7 +2247,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bc6f3b06",
+   "id": "907fe6c2",
    "metadata": {
     "editable": true
    },
@@ -2261,7 +2261,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "dc4a3cc1",
+   "id": "cd33ce76",
    "metadata": {
     "editable": true
    },
@@ -2271,7 +2271,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "08f2c16f",
+   "id": "288196ba",
    "metadata": {
     "editable": true
    },
@@ -2285,7 +2285,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "cf0cdec1",
+   "id": "75f7d647",
    "metadata": {
     "editable": true
    },
@@ -2300,7 +2300,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "09331364",
+   "id": "9770bf6b",
    "metadata": {
     "editable": true
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@@ -2317,7 +2317,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e33f82e0",
+   "id": "d01ec548",
    "metadata": {
     "editable": true
    },
@@ -2329,7 +2329,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "66f63143",
+   "id": "abbb12b0",
    "metadata": {
     "editable": true
    },
@@ -2343,7 +2343,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f142b72d",
+   "id": "4edff007",
    "metadata": {
     "editable": true
    },
@@ -2358,7 +2358,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4eabd571",
+   "id": "3dab13b2",
    "metadata": {
     "editable": true
    },
@@ -2370,7 +2370,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ffe4b219",
+   "id": "559e08ea",
    "metadata": {
     "editable": true
    },
@@ -2381,7 +2381,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "94227387",
+   "id": "b9feb45e",
    "metadata": {
     "editable": true
    },
@@ -2409,7 +2409,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f9c9acca",
+   "id": "b9c3fc33",
    "metadata": {
     "editable": true
    },
@@ -2431,7 +2431,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "34076369",
+   "id": "96c809d9",
    "metadata": {
     "editable": true
    },
@@ -2453,7 +2453,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "98b8ba57",
+   "id": "338c5e32",
    "metadata": {
     "editable": true
    },
@@ -2465,7 +2465,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4023c65f",
+   "id": "82a6bfac",
    "metadata": {
     "editable": true
    },
@@ -2502,7 +2502,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a156eb65",
+   "id": "9c8b03cb",
    "metadata": {
     "editable": true
    },
@@ -2530,7 +2530,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1685e3a9",
+   "id": "8cc20cdd",
    "metadata": {
     "editable": true
    },
@@ -2560,7 +2560,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1e235b14",
+   "id": "ae49d5a6",
    "metadata": {
     "editable": true
    },
@@ -2584,7 +2584,7 @@
   {
    "cell_type": "code",
    "execution_count": 13,
-   "id": "423023b6",
+   "id": "6ae1a6c6",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2597,7 +2597,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7d3e4e87",
+   "id": "32e5970a",
    "metadata": {
     "editable": true
    },
@@ -2608,7 +2608,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7aef491e",
+   "id": "a2c8a212",
    "metadata": {
     "editable": true
    },
@@ -2620,7 +2620,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "56b39a11",
+   "id": "c3e911a2",
    "metadata": {
     "editable": true
    },
@@ -2630,7 +2630,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3b8e0359",
+   "id": "d3917870",
    "metadata": {
     "editable": true
    },
@@ -2642,7 +2642,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f91a1970",
+   "id": "8c836f4c",
    "metadata": {
     "editable": true
    },
@@ -2656,7 +2656,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "da15de65",
+   "id": "97b8967d",
    "metadata": {
     "editable": true
    },
@@ -2672,7 +2672,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "86e6e217",
+   "id": "85a81bd7",
    "metadata": {
     "editable": true
    },
@@ -2682,7 +2682,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c400a0bd",
+   "id": "a8d494ae",
    "metadata": {
     "editable": true
    },
@@ -2694,7 +2694,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d4610f23",
+   "id": "da3bb281",
    "metadata": {
     "editable": true
    },
@@ -2704,7 +2704,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "36e72a73",
+   "id": "2a11943d",
    "metadata": {
     "editable": true
    },
@@ -2716,7 +2716,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2692f00b",
+   "id": "ff7156cc",
    "metadata": {
     "editable": true
    },
@@ -2730,7 +2730,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "53ebc94f",
+   "id": "7d4462ac",
    "metadata": {
     "editable": true
    },
@@ -2740,7 +2740,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "400fda22",
+   "id": "0e15feb3",
    "metadata": {
     "editable": true
    },
@@ -2751,7 +2751,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ecbbb87d",
+   "id": "cfa97d73",
    "metadata": {
     "editable": true
    },
@@ -2766,7 +2766,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c1ce606a",
+   "id": "30d4e63c",
    "metadata": {
     "editable": true
    },
@@ -2776,7 +2776,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "79990fcc",
+   "id": "d7c7f1e6",
    "metadata": {
     "editable": true
    },
@@ -2788,7 +2788,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c54a5590",
+   "id": "c7fd06bf",
    "metadata": {
     "editable": true
    },
@@ -2800,7 +2800,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "95525efc",
+   "id": "de2f5e8c",
    "metadata": {
     "editable": true
    },
@@ -2815,7 +2815,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "96669463",
+   "id": "17a11365",
    "metadata": {
     "editable": true
    },
@@ -2828,7 +2828,7 @@
   {
    "cell_type": "code",
    "execution_count": 14,
-   "id": "5ac472e8",
+   "id": "0a856857",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2885,7 +2885,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "aaa15f21",
+   "id": "1b4171cf",
    "metadata": {
     "editable": true
    },
@@ -2896,7 +2896,7 @@
   {
    "cell_type": "code",
    "execution_count": 15,
-   "id": "5db63ee4",
+   "id": "e92ec46b",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2923,7 +2923,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "72dd040a",
+   "id": "1739c8d0",
    "metadata": {
     "editable": true
    },
@@ -2935,7 +2935,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9d82f262",
+   "id": "13233cfd",
    "metadata": {
     "editable": true
    },
@@ -2947,7 +2947,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c3ddb9a4",
+   "id": "05e2fec0",
    "metadata": {
     "editable": true
    },
@@ -2957,7 +2957,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8cb6e70e",
+   "id": "28ca12ed",
    "metadata": {
     "editable": true
    },
@@ -2971,7 +2971,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6b1d7d8a",
+   "id": "819e8b1e",
    "metadata": {
     "editable": true
    },
@@ -2981,7 +2981,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1f8b03a4",
+   "id": "013da700",
    "metadata": {
     "editable": true
    },
@@ -2993,7 +2993,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8e0dadf7",
+   "id": "54f647b4",
    "metadata": {
     "editable": true
    },
@@ -3004,7 +3004,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9ecbd226",
+   "id": "c172c6d9",
    "metadata": {
     "editable": true
    },
@@ -3019,7 +3019,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2a337d25",
+   "id": "c37396eb",
    "metadata": {
     "editable": true
    },
@@ -3033,7 +3033,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1c5342e5",
+   "id": "721a4fa2",
    "metadata": {
     "editable": true
    },
@@ -3044,7 +3044,7 @@
   {
    "cell_type": "code",
    "execution_count": 16,
-   "id": "067ba195",
+   "id": "e4a37569",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3105,7 +3105,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e8fec18e",
+   "id": "636dcfea",
    "metadata": {
     "editable": true
    },
@@ -3127,7 +3127,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9174bb05",
+   "id": "112229e3",
    "metadata": {
     "editable": true
    },
diff --git a/doc/src/week38/week38.do.txt b/doc/src/week38/week38.do.txt
index 4eebb1447..e5a537c0a 100644
--- a/doc/src/week38/week38.do.txt
+++ b/doc/src/week38/week38.do.txt
@@ -1,6 +1,6 @@
 TITLE: Data Analysis and Machine Learning: Logistic Regression and Optimization
 AUTHOR: Morten Hjorth-Jensen {copyright, 1999-present|CC BY-NC} at Department of Physics and Center for Computing in Science Education, University of Oslo & Department of Physics and Astronomy and Facility for Rare Isotope Beams, Michigan State University
-DATE: Week 38
+DATE: September 18-24