diff --git a/doc/pub/week44/html/._week44-bs000.html b/doc/pub/week44/html/._week44-bs000.html
index 66706d65e..8fc5cd4c3 100644
--- a/doc/pub/week44/html/._week44-bs000.html
+++ b/doc/pub/week44/html/._week44-bs000.html
@@ -318,7 +318,7 @@ MathJax.Hub.Config({
 </center>
 <br>
 <center>
-<h4>Nov 1, 2022</h4>
+<h4>Nov 2, 2022</h4>
 </center> <!-- date -->
 <br>
 
diff --git a/doc/pub/week44/html/._week44-bs001.html b/doc/pub/week44/html/._week44-bs001.html
index 373a514c3..ddcb93a03 100644
--- a/doc/pub/week44/html/._week44-bs001.html
+++ b/doc/pub/week44/html/._week44-bs001.html
@@ -304,6 +304,9 @@ MathJax.Hub.Config({
 
 <ul>
 <li> Thursday: Basics of decision trees, classification and regression algorithms</li>
+<ul>
+  <li> <b>Note</b>: Thursday's lecture is digital only due to "High-school post-education day":https://www.uio.no/om/samarbeid/skole/fagped-dag/"</li>
+</ul>
 <li> Friday: Decision trees and  ensemble models (bagging and random forests)</li>
 </ul>
 <div class="panel panel-default">
diff --git a/doc/pub/week44/html/week44-bs.html b/doc/pub/week44/html/week44-bs.html
index 66706d65e..8fc5cd4c3 100644
--- a/doc/pub/week44/html/week44-bs.html
+++ b/doc/pub/week44/html/week44-bs.html
@@ -318,7 +318,7 @@ MathJax.Hub.Config({
 </center>
 <br>
 <center>
-<h4>Nov 1, 2022</h4>
+<h4>Nov 2, 2022</h4>
 </center> <!-- date -->
 <br>
 
diff --git a/doc/pub/week44/html/week44-reveal.html b/doc/pub/week44/html/week44-reveal.html
index bb43e0325..be9a7a6e2 100644
--- a/doc/pub/week44/html/week44-reveal.html
+++ b/doc/pub/week44/html/week44-reveal.html
@@ -184,7 +184,7 @@ MathJax.Hub.Config({
 </center>
 <br>
 <center>
-<h4>Nov 1, 2022</h4>
+<h4>Nov 2, 2022</h4>
 </center> <!-- date -->
 <br>
 
@@ -199,6 +199,11 @@ MathJax.Hub.Config({
 
 <ul>
 <p><li> Thursday: Basics of decision trees, classification and regression algorithms</li>
+<ul>
+
+<p><li> <b>Note</b>: Thursday's lecture is digital only due to "High-school post-education day":https://www.uio.no/om/samarbeid/skole/fagped-dag/"</li>
+</ul>
+<p>
 <p><li> Friday: Decision trees and  ensemble models (bagging and random forests)</li>
 </ul>
 <p>
diff --git a/doc/pub/week44/html/week44-solarized.html b/doc/pub/week44/html/week44-solarized.html
index 7635ffc80..9a05309ee 100644
--- a/doc/pub/week44/html/week44-solarized.html
+++ b/doc/pub/week44/html/week44-solarized.html
@@ -262,7 +262,7 @@ MathJax.Hub.Config({
 </center>
 <br>
 <center>
-<h4>Nov 1, 2022</h4>
+<h4>Nov 2, 2022</h4>
 </center> <!-- date -->
 <br>
 
@@ -271,6 +271,9 @@ MathJax.Hub.Config({
 
 <ul>
 <li> Thursday: Basics of decision trees, classification and regression algorithms</li>
+<ul>
+  <li> <b>Note</b>: Thursday's lecture is digital only due to "High-school post-education day":https://www.uio.no/om/samarbeid/skole/fagped-dag/"</li>
+</ul>
 <li> Friday: Decision trees and  ensemble models (bagging and random forests)</li>
 </ul>
 <div class="alert alert-block alert-block alert-text-normal">
diff --git a/doc/pub/week44/html/week44.html b/doc/pub/week44/html/week44.html
index e7c71a386..80cdc072d 100644
--- a/doc/pub/week44/html/week44.html
+++ b/doc/pub/week44/html/week44.html
@@ -339,7 +339,7 @@ MathJax.Hub.Config({
 </center>
 <br>
 <center>
-<h4>Nov 1, 2022</h4>
+<h4>Nov 2, 2022</h4>
 </center> <!-- date -->
 <br>
 
@@ -348,6 +348,9 @@ MathJax.Hub.Config({
 
 <ul>
 <li> Thursday: Basics of decision trees, classification and regression algorithms</li>
+<ul>
+  <li> <b>Note</b>: Thursday's lecture is digital only due to "High-school post-education day":https://www.uio.no/om/samarbeid/skole/fagped-dag/"</li>
+</ul>
 <li> Friday: Decision trees and  ensemble models (bagging and random forests)</li>
 </ul>
 <div class="alert alert-block alert-block alert-text-normal">
diff --git a/doc/pub/week44/ipynb/ipynb-week44-src.tar.gz b/doc/pub/week44/ipynb/ipynb-week44-src.tar.gz
index 4c52e88e6..e304f1a88 100644
Binary files a/doc/pub/week44/ipynb/ipynb-week44-src.tar.gz and b/doc/pub/week44/ipynb/ipynb-week44-src.tar.gz differ
diff --git a/doc/pub/week44/ipynb/week44.ipynb b/doc/pub/week44/ipynb/week44.ipynb
index 8b5e8ac61..9b0aca0ae 100644
--- a/doc/pub/week44/ipynb/week44.ipynb
+++ b/doc/pub/week44/ipynb/week44.ipynb
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "303fdfce",
+   "id": "d71885d1",
    "metadata": {
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@@ -14,7 +14,7 @@
   },
   {
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-   "id": "89424210",
+   "id": "51c93be7",
    "metadata": {
     "editable": true
    },
@@ -22,14 +22,14 @@
     "# Week 44: Decision Trees, Ensemble methods  and Random Forests\n",
     "**Morten Hjorth-Jensen**, Department of Physics, University of Oslo and Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University\n",
     "\n",
-    "Date: **Nov 1, 2022**\n",
+    "Date: **Nov 2, 2022**\n",
     "\n",
     "Copyright 1999-2022, Morten Hjorth-Jensen. Released under CC Attribution-NonCommercial 4.0 license"
    ]
   },
   {
    "cell_type": "markdown",
-   "id": "6177c33f",
+   "id": "dc2cab51",
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@@ -38,6 +38,8 @@
     "\n",
     "* Thursday: Basics of decision trees, classification and regression algorithms\n",
     "\n",
+    "  * **Note**: Thursday's lecture is digital only due to \"High-school post-education day\":https://www.uio.no/om/samarbeid/skole/fagped-dag/\"\n",
+    "\n",
     "* Friday: Decision trees and  ensemble models (bagging and random forests)\n",
     "\n",
     "**Videos.**\n",
@@ -51,7 +53,7 @@
   },
   {
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+   "id": "2bf703ef",
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@@ -69,7 +71,7 @@
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@@ -134,7 +136,7 @@
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@@ -147,7 +149,7 @@
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@@ -165,7 +167,7 @@
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@@ -188,7 +190,7 @@
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@@ -211,7 +213,7 @@
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@@ -222,7 +224,7 @@
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-   "id": "287a7d14",
+   "id": "3b672587",
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@@ -323,7 +325,7 @@
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@@ -345,7 +347,7 @@
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@@ -357,7 +359,7 @@
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@@ -368,7 +370,7 @@
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@@ -390,7 +392,7 @@
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@@ -403,7 +405,7 @@
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@@ -415,7 +417,7 @@
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@@ -425,7 +427,7 @@
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@@ -437,7 +439,7 @@
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@@ -447,7 +449,7 @@
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@@ -459,7 +461,7 @@
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@@ -492,7 +494,7 @@
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@@ -516,7 +518,7 @@
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@@ -540,7 +542,7 @@
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@@ -568,7 +570,7 @@
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@@ -594,7 +596,7 @@
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@@ -617,7 +619,7 @@
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@@ -644,7 +646,7 @@
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@@ -663,7 +665,7 @@
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@@ -675,7 +677,7 @@
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@@ -688,7 +690,7 @@
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@@ -700,7 +702,7 @@
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@@ -710,7 +712,7 @@
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@@ -722,7 +724,7 @@
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@@ -732,7 +734,7 @@
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@@ -744,7 +746,7 @@
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+   "id": "47632237",
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@@ -755,7 +757,7 @@
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@@ -799,7 +801,7 @@
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@@ -810,7 +812,7 @@
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-   "id": "2600e2b7",
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@@ -845,7 +847,7 @@
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@@ -858,7 +860,7 @@
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@@ -876,7 +878,7 @@
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@@ -890,7 +892,7 @@
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@@ -909,7 +911,7 @@
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@@ -929,7 +931,7 @@
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@@ -946,7 +948,7 @@
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@@ -958,7 +960,7 @@
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@@ -975,7 +977,7 @@
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@@ -988,7 +990,7 @@
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@@ -1000,7 +1002,7 @@
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@@ -1010,7 +1012,7 @@
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@@ -1022,7 +1024,7 @@
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@@ -1032,7 +1034,7 @@
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@@ -1044,7 +1046,7 @@
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@@ -1057,7 +1059,7 @@
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@@ -1072,7 +1074,7 @@
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@@ -1265,7 +1267,7 @@
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    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1615,7 +1617,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "05262e92",
+   "id": "2d2ec3db",
    "metadata": {
     "editable": true
    },
@@ -1626,7 +1628,7 @@
   {
    "cell_type": "code",
    "execution_count": 11,
-   "id": "2f5aa1d2",
+   "id": "72026bb5",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1644,7 +1646,7 @@
   {
    "cell_type": "code",
    "execution_count": 12,
-   "id": "d0431be6",
+   "id": "38fbe6f2",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1659,7 +1661,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b7efc61a",
+   "id": "cc4785b1",
    "metadata": {
     "editable": true
    },
@@ -1670,7 +1672,7 @@
   {
    "cell_type": "code",
    "execution_count": 13,
-   "id": "5c00cb35",
+   "id": "54b15ed3",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1720,7 +1722,7 @@
   {
    "cell_type": "code",
    "execution_count": 14,
-   "id": "03b39894",
+   "id": "92e9f134",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1759,7 +1761,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d71f0ce9",
+   "id": "d6dfb6d9",
    "metadata": {
     "editable": true
    },
@@ -1783,7 +1785,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4ad744d7",
+   "id": "6683775c",
    "metadata": {
     "editable": true
    },
@@ -1811,7 +1813,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "919de051",
+   "id": "bf52cfd7",
    "metadata": {
     "editable": true
    },
@@ -1842,7 +1844,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b2e868f1",
+   "id": "2c39236d",
    "metadata": {
     "editable": true
    },
@@ -1858,7 +1860,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e790cf95",
+   "id": "437f82d0",
    "metadata": {
     "editable": true
    },
@@ -1882,7 +1884,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9cd3580f",
+   "id": "12c69836",
    "metadata": {
     "editable": true
    },
@@ -1913,7 +1915,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "47969bcd",
+   "id": "a8614384",
    "metadata": {
     "editable": true
    },
@@ -1924,7 +1926,7 @@
   {
    "cell_type": "code",
    "execution_count": 15,
-   "id": "67de73ef",
+   "id": "60dd5ef6",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1972,7 +1974,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "606e8c8e",
+   "id": "0323fdfd",
    "metadata": {
     "editable": true
    },
@@ -1983,7 +1985,7 @@
   {
    "cell_type": "code",
    "execution_count": 16,
-   "id": "b107a1cf",
+   "id": "74dfd159",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2017,7 +2019,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6abdb36a",
+   "id": "3f8db29e",
    "metadata": {
     "editable": true
    },
@@ -2030,7 +2032,7 @@
   {
    "cell_type": "code",
    "execution_count": 17,
-   "id": "00bce4fc",
+   "id": "1f4c6479",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2083,7 +2085,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "dbbf0823",
+   "id": "7b578c34",
    "metadata": {
     "editable": true
    },
@@ -2094,7 +2096,7 @@
   {
    "cell_type": "code",
    "execution_count": 18,
-   "id": "deee652c",
+   "id": "891c848b",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2124,7 +2126,7 @@
   {
    "cell_type": "code",
    "execution_count": 19,
-   "id": "4f831127",
+   "id": "47b632ab",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2142,7 +2144,7 @@
   {
    "cell_type": "code",
    "execution_count": 20,
-   "id": "4f0ede67",
+   "id": "e2f5031e",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2162,7 +2164,7 @@
   {
    "cell_type": "code",
    "execution_count": 21,
-   "id": "a6234319",
+   "id": "b0719293",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2179,7 +2181,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "27964504",
+   "id": "b9966fed",
    "metadata": {
     "editable": true
    },
@@ -2201,7 +2203,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a014fe49",
+   "id": "e8613549",
    "metadata": {
     "editable": true
    },
@@ -2233,7 +2235,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "44189d88",
+   "id": "72be9bd5",
    "metadata": {
     "editable": true
    },
@@ -2247,7 +2249,7 @@
   {
    "cell_type": "code",
    "execution_count": 22,
-   "id": "3d81803f",
+   "id": "b2f5c535",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2316,7 +2318,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1eabd234",
+   "id": "decc7681",
    "metadata": {
     "editable": true
    },
@@ -2339,7 +2341,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d39aa2d2",
+   "id": "b047a99c",
    "metadata": {
     "editable": true
    },
@@ -2351,7 +2353,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c5d99442",
+   "id": "cfb22949",
    "metadata": {
     "editable": true
    },
@@ -2376,7 +2378,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5e11503c",
+   "id": "8bec594f",
    "metadata": {
     "editable": true
    },
@@ -2402,7 +2404,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3af7a38e",
+   "id": "23480abb",
    "metadata": {
     "editable": true
    },
@@ -2413,7 +2415,7 @@
   {
    "cell_type": "code",
    "execution_count": 23,
-   "id": "d8858b60",
+   "id": "c7542bff",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2485,7 +2487,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "19019bbb",
+   "id": "e4bead63",
    "metadata": {
     "editable": true
    },
@@ -2501,7 +2503,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c7f1b6d0",
+   "id": "78db991e",
    "metadata": {
     "editable": true
    },
@@ -2512,7 +2514,7 @@
   {
    "cell_type": "code",
    "execution_count": 24,
-   "id": "62a22d27",
+   "id": "c12e0ecd",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2527,7 +2529,7 @@
   {
    "cell_type": "code",
    "execution_count": 25,
-   "id": "3943a3d6",
+   "id": "9b3dadd3",
    "metadata": {
     "collapsed": false,
     "editable": true
diff --git a/doc/src/week44/Programs/DataFiles/grade.dot b/doc/src/week44/Programs/DataFiles/grade.dot
index dfcc5ea10..8e7ce005b 100644
--- a/doc/src/week44/Programs/DataFiles/grade.dot
+++ b/doc/src/week44/Programs/DataFiles/grade.dot
@@ -2,12 +2,12 @@ digraph Tree {
 node [shape=box, style="filled, rounded", color="black", fontname="helvetica"] ;
 edge [fontname="helvetica"] ;
 0 [label="X[0] <= 0.5\ngini = 0.48\nsamples = 10\nvalue = [6, 4]", fillcolor="#f6d5bd"] ;
-1 [label="X[5] <= 0.5\ngini = 0.444\nsamples = 6\nvalue = [2, 4]", fillcolor="#9ccef2"] ;
+1 [label="gini = 0.0\nsamples = 4\nvalue = [4, 0]", fillcolor="#e58139"] ;
 0 -> 1 [labeldistance=2.5, labelangle=45, headlabel="True"] ;
-2 [label="gini = 0.0\nsamples = 2\nvalue = [2, 0]", fillcolor="#e58139"] ;
-1 -> 2 ;
-3 [label="gini = 0.0\nsamples = 4\nvalue = [0, 4]", fillcolor="#399de5"] ;
-1 -> 3 ;
-4 [label="gini = 0.0\nsamples = 4\nvalue = [4, 0]", fillcolor="#e58139"] ;
-0 -> 4 [labeldistance=2.5, labelangle=-45, headlabel="False"] ;
+2 [label="X[2] <= 0.5\ngini = 0.444\nsamples = 6\nvalue = [2, 4]", fillcolor="#9ccef2"] ;
+0 -> 2 [labeldistance=2.5, labelangle=-45, headlabel="False"] ;
+3 [label="gini = 0.0\nsamples = 2\nvalue = [2, 0]", fillcolor="#e58139"] ;
+2 -> 3 ;
+4 [label="gini = 0.0\nsamples = 4\nvalue = [0, 4]", fillcolor="#399de5"] ;
+2 -> 4 ;
 }
\ No newline at end of file
diff --git a/doc/src/week44/Programs/DataFiles/grades.png b/doc/src/week44/Programs/DataFiles/grades.png
index aa8851b18..dcee0ab27 100644
Binary files a/doc/src/week44/Programs/DataFiles/grades.png and b/doc/src/week44/Programs/DataFiles/grades.png differ
diff --git a/doc/src/week44/Programs/grades.py b/doc/src/week44/Programs/grades.py
index fc8f00c38..8113079b1 100644
--- a/doc/src/week44/Programs/grades.py
+++ b/doc/src/week44/Programs/grades.py
@@ -45,12 +45,15 @@ display(grades)
 X = grades.loc[:, grades.columns != 'Grade'].values
 y = grades.loc[:, grades.columns == 'Grade'].values
 print(X)
+"""
 # Create the encoder.
 encoder = OneHotEncoder(handle_unknown="ignore")
 # Assume for simplicity all features are categorical.
 encoder.fit(X)    
 # Apply the encoder.
 X = encoder.transform(X)
+print(X)
+"""
 # Then do a Classification tree
 tree_clf = DecisionTreeClassifier(max_depth=2)
 tree_clf.fit(X, y)
diff --git a/doc/src/week44/week44.do.txt b/doc/src/week44/week44.do.txt
index 9b7c7063e..f9aa59072 100644
--- a/doc/src/week44/week44.do.txt
+++ b/doc/src/week44/week44.do.txt
@@ -7,6 +7,7 @@ DATE: today
 ===== Overview of week 44 =====
 
 * Thursday: Basics of decision trees, classification and regression algorithms
+  * _Note_: Thursday's lecture is digital only due to "High-school post-education day":https://www.uio.no/om/samarbeid/skole/fagped-dag/"
 * Friday: Decision trees and  ensemble models (bagging and random forests)
 
 !bblock Videos