384 lines
22 KiB
HTML
384 lines
22 KiB
HTML
<!--
|
|
HTML file automatically generated from DocOnce source
|
|
(https://github.com/doconce/doconce/)
|
|
doconce format html week38.do.txt --html_style=bootstrap --pygments_html_style=default --html_admon=bootstrap_panel --html_output=week38-bs --no_mako
|
|
-->
|
|
<html>
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<meta name="generator" content="DocOnce: https://github.com/doconce/doconce/" />
|
|
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
|
|
<meta name="description" content="Week 38: Logistic Regression and Optimization">
|
|
<title>Week 38: Logistic Regression and Optimization</title>
|
|
<!-- Bootstrap style: bootstrap -->
|
|
<!-- doconce format html week38.do.txt --html_style=bootstrap --pygments_html_style=default --html_admon=bootstrap_panel --html_output=week38-bs --no_mako -->
|
|
<link href="https://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css" rel="stylesheet">
|
|
<!-- not necessary
|
|
<link href="https://netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.css" rel="stylesheet">
|
|
-->
|
|
<style type="text/css">
|
|
/* Add scrollbar to dropdown menus in bootstrap navigation bar */
|
|
.dropdown-menu {
|
|
height: auto;
|
|
max-height: 400px;
|
|
overflow-x: hidden;
|
|
}
|
|
/* Adds an invisible element before each target to offset for the navigation
|
|
bar */
|
|
.anchor::before {
|
|
content:"";
|
|
display:block;
|
|
height:50px; /* fixed header height for style bootstrap */
|
|
margin:-50px 0 0; /* negative fixed header height */
|
|
}
|
|
</style>
|
|
</head>
|
|
|
|
<!-- tocinfo
|
|
{'highest level': 2,
|
|
'sections': [('Plans for week 38, lecture Monday September 16',
|
|
2,
|
|
None,
|
|
'plans-for-week-38-lecture-monday-september-16'),
|
|
('Suggested reading and videos',
|
|
2,
|
|
None,
|
|
'suggested-reading-and-videos'),
|
|
('Plans for the lab sessions',
|
|
2,
|
|
None,
|
|
'plans-for-the-lab-sessions'),
|
|
('Material for lecture Monday September 16',
|
|
2,
|
|
None,
|
|
'material-for-lecture-monday-september-16'),
|
|
('Logistic Regression', 2, None, 'logistic-regression'),
|
|
('Classification problems', 2, None, 'classification-problems'),
|
|
('Optimization and Deep learning',
|
|
2,
|
|
None,
|
|
'optimization-and-deep-learning'),
|
|
('Basics', 2, None, 'basics'),
|
|
('Linear classifier', 2, None, 'linear-classifier'),
|
|
('Some selected properties', 2, None, 'some-selected-properties'),
|
|
('Simple example', 2, None, 'simple-example'),
|
|
('Plotting the mean value for each group',
|
|
2,
|
|
None,
|
|
'plotting-the-mean-value-for-each-group'),
|
|
('The logistic function', 2, None, 'the-logistic-function'),
|
|
('Examples of likelihood functions used in logistic regression '
|
|
'and nueral networks',
|
|
2,
|
|
None,
|
|
'examples-of-likelihood-functions-used-in-logistic-regression-and-nueral-networks'),
|
|
('Two parameters', 2, None, 'two-parameters'),
|
|
('Maximum likelihood', 2, None, 'maximum-likelihood'),
|
|
('The cost function rewritten',
|
|
2,
|
|
None,
|
|
'the-cost-function-rewritten'),
|
|
('Minimizing the cross entropy',
|
|
2,
|
|
None,
|
|
'minimizing-the-cross-entropy'),
|
|
('A more compact expression',
|
|
2,
|
|
None,
|
|
'a-more-compact-expression'),
|
|
('Extending to more predictors',
|
|
2,
|
|
None,
|
|
'extending-to-more-predictors'),
|
|
('Including more classes', 2, None, 'including-more-classes'),
|
|
('More classes', 2, None, 'more-classes'),
|
|
('Searching for Optimal Regularization Parameters $\\lambda$',
|
|
2,
|
|
None,
|
|
'searching-for-optimal-regularization-parameters-lambda'),
|
|
('Grid Search', 2, None, 'grid-search'),
|
|
('Randomized Grid Search', 2, None, 'randomized-grid-search'),
|
|
('Wisconsin Cancer Data', 2, None, 'wisconsin-cancer-data'),
|
|
('Using the correlation matrix',
|
|
2,
|
|
None,
|
|
'using-the-correlation-matrix'),
|
|
('Discussing the correlation data',
|
|
2,
|
|
None,
|
|
'discussing-the-correlation-data'),
|
|
('Other measures in classification studies: Cancer Data again',
|
|
2,
|
|
None,
|
|
'other-measures-in-classification-studies-cancer-data-again'),
|
|
('Optimization, the central part of any Machine Learning '
|
|
'algortithm',
|
|
2,
|
|
None,
|
|
'optimization-the-central-part-of-any-machine-learning-algortithm'),
|
|
('Revisiting our Logistic Regression case',
|
|
2,
|
|
None,
|
|
'revisiting-our-logistic-regression-case'),
|
|
('The equations to solve', 2, None, 'the-equations-to-solve'),
|
|
("Solving using Newton-Raphson's method",
|
|
2,
|
|
None,
|
|
'solving-using-newton-raphson-s-method'),
|
|
("Brief reminder on Newton-Raphson's method",
|
|
2,
|
|
None,
|
|
'brief-reminder-on-newton-raphson-s-method'),
|
|
('The equations', 2, None, 'the-equations'),
|
|
('Simple geometric interpretation',
|
|
2,
|
|
None,
|
|
'simple-geometric-interpretation'),
|
|
('Extending to more than one variable',
|
|
2,
|
|
None,
|
|
'extending-to-more-than-one-variable'),
|
|
('Steepest descent', 2, None, 'steepest-descent'),
|
|
('More on Steepest descent', 2, None, 'more-on-steepest-descent'),
|
|
('The ideal', 2, None, 'the-ideal'),
|
|
('The sensitiveness of the gradient descent',
|
|
2,
|
|
None,
|
|
'the-sensitiveness-of-the-gradient-descent'),
|
|
('Convex functions', 2, None, 'convex-functions'),
|
|
('Convex function', 2, None, 'convex-function'),
|
|
('Conditions on convex functions',
|
|
2,
|
|
None,
|
|
'conditions-on-convex-functions'),
|
|
('More on convex functions', 2, None, 'more-on-convex-functions'),
|
|
('Some simple problems', 2, None, 'some-simple-problems'),
|
|
('Revisiting our first homework',
|
|
2,
|
|
None,
|
|
'revisiting-our-first-homework'),
|
|
('Gradient descent example', 2, None, 'gradient-descent-example'),
|
|
('The derivative of the cost/loss function',
|
|
2,
|
|
None,
|
|
'the-derivative-of-the-cost-loss-function'),
|
|
('The Hessian matrix', 2, None, 'the-hessian-matrix'),
|
|
('Simple program', 2, None, 'simple-program'),
|
|
('Gradient Descent Example', 2, None, 'gradient-descent-example'),
|
|
('And a corresponding example using _scikit-learn_',
|
|
2,
|
|
None,
|
|
'and-a-corresponding-example-using-scikit-learn'),
|
|
('Gradient descent and Ridge',
|
|
2,
|
|
None,
|
|
'gradient-descent-and-ridge'),
|
|
('The Hessian matrix for Ridge Regression',
|
|
2,
|
|
None,
|
|
'the-hessian-matrix-for-ridge-regression'),
|
|
('Program example for gradient descent with Ridge Regression',
|
|
2,
|
|
None,
|
|
'program-example-for-gradient-descent-with-ridge-regression'),
|
|
('Using gradient descent methods, limitations',
|
|
2,
|
|
None,
|
|
'using-gradient-descent-methods-limitations'),
|
|
('Challenge yourself the coming weekend',
|
|
2,
|
|
None,
|
|
'challenge-yourself-the-coming-weekend'),
|
|
('Lab session: Material from last week and relevant for the '
|
|
'first project',
|
|
2,
|
|
None,
|
|
'lab-session-material-from-last-week-and-relevant-for-the-first-project'),
|
|
('Various steps in cross-validation',
|
|
2,
|
|
None,
|
|
'various-steps-in-cross-validation'),
|
|
('How to set up the cross-validation for Ridge and/or Lasso',
|
|
2,
|
|
None,
|
|
'how-to-set-up-the-cross-validation-for-ridge-and-or-lasso'),
|
|
('Cross-validation in brief',
|
|
2,
|
|
None,
|
|
'cross-validation-in-brief'),
|
|
('Code Example for Cross-validation and $k$-fold '
|
|
'Cross-validation',
|
|
2,
|
|
None,
|
|
'code-example-for-cross-validation-and-k-fold-cross-validation')]}
|
|
end of tocinfo -->
|
|
|
|
<body>
|
|
|
|
|
|
|
|
<script type="text/x-mathjax-config">
|
|
MathJax.Hub.Config({
|
|
TeX: {
|
|
equationNumbers: { autoNumber: "none" },
|
|
extensions: ["AMSmath.js", "AMSsymbols.js", "autobold.js", "color.js"]
|
|
}
|
|
});
|
|
</script>
|
|
<script type="text/javascript" async
|
|
src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
|
|
</script>
|
|
|
|
|
|
<!-- Bootstrap navigation bar -->
|
|
<div class="navbar navbar-default navbar-fixed-top">
|
|
<div class="navbar-header">
|
|
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-responsive-collapse">
|
|
<span class="icon-bar"></span>
|
|
<span class="icon-bar"></span>
|
|
<span class="icon-bar"></span>
|
|
</button>
|
|
<a class="navbar-brand" href="week38-bs.html">Week 38: Logistic Regression and Optimization</a>
|
|
</div>
|
|
<div class="navbar-collapse collapse navbar-responsive-collapse">
|
|
<ul class="nav navbar-nav navbar-right">
|
|
<li class="dropdown">
|
|
<a href="#" class="dropdown-toggle" data-toggle="dropdown">Contents <b class="caret"></b></a>
|
|
<ul class="dropdown-menu">
|
|
<!-- navigation toc: --> <li><a href="._week38-bs001.html#plans-for-week-38-lecture-monday-september-16" style="font-size: 80%;">Plans for week 38, lecture Monday September 16</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs002.html#suggested-reading-and-videos" style="font-size: 80%;">Suggested reading and videos</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs003.html#plans-for-the-lab-sessions" style="font-size: 80%;">Plans for the lab sessions</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs004.html#material-for-lecture-monday-september-16" style="font-size: 80%;">Material for lecture Monday September 16</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs005.html#logistic-regression" style="font-size: 80%;">Logistic Regression</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs006.html#classification-problems" style="font-size: 80%;">Classification problems</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs007.html#optimization-and-deep-learning" style="font-size: 80%;">Optimization and Deep learning</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs008.html#basics" style="font-size: 80%;">Basics</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs009.html#linear-classifier" style="font-size: 80%;">Linear classifier</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs010.html#some-selected-properties" style="font-size: 80%;">Some selected properties</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs011.html#simple-example" style="font-size: 80%;">Simple example</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs012.html#plotting-the-mean-value-for-each-group" style="font-size: 80%;">Plotting the mean value for each group</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs013.html#the-logistic-function" style="font-size: 80%;">The logistic function</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs014.html#examples-of-likelihood-functions-used-in-logistic-regression-and-nueral-networks" style="font-size: 80%;">Examples of likelihood functions used in logistic regression and nueral networks</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs015.html#two-parameters" style="font-size: 80%;">Two parameters</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs016.html#maximum-likelihood" style="font-size: 80%;">Maximum likelihood</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs017.html#the-cost-function-rewritten" style="font-size: 80%;">The cost function rewritten</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs018.html#minimizing-the-cross-entropy" style="font-size: 80%;">Minimizing the cross entropy</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs019.html#a-more-compact-expression" style="font-size: 80%;">A more compact expression</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs020.html#extending-to-more-predictors" style="font-size: 80%;">Extending to more predictors</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs021.html#including-more-classes" style="font-size: 80%;">Including more classes</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs022.html#more-classes" style="font-size: 80%;">More classes</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs023.html#searching-for-optimal-regularization-parameters-lambda" style="font-size: 80%;">Searching for Optimal Regularization Parameters \( \lambda \)</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs024.html#grid-search" style="font-size: 80%;">Grid Search</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs025.html#randomized-grid-search" style="font-size: 80%;">Randomized Grid Search</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs026.html#wisconsin-cancer-data" style="font-size: 80%;">Wisconsin Cancer Data</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs027.html#using-the-correlation-matrix" style="font-size: 80%;">Using the correlation matrix</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs028.html#discussing-the-correlation-data" style="font-size: 80%;">Discussing the correlation data</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs029.html#other-measures-in-classification-studies-cancer-data-again" style="font-size: 80%;">Other measures in classification studies: Cancer Data again</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs030.html#optimization-the-central-part-of-any-machine-learning-algortithm" style="font-size: 80%;">Optimization, the central part of any Machine Learning algortithm</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs031.html#revisiting-our-logistic-regression-case" style="font-size: 80%;">Revisiting our Logistic Regression case</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs032.html#the-equations-to-solve" style="font-size: 80%;">The equations to solve</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs033.html#solving-using-newton-raphson-s-method" style="font-size: 80%;">Solving using Newton-Raphson's method</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs034.html#brief-reminder-on-newton-raphson-s-method" style="font-size: 80%;">Brief reminder on Newton-Raphson's method</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs035.html#the-equations" style="font-size: 80%;">The equations</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs036.html#simple-geometric-interpretation" style="font-size: 80%;">Simple geometric interpretation</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs037.html#extending-to-more-than-one-variable" style="font-size: 80%;">Extending to more than one variable</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs038.html#steepest-descent" style="font-size: 80%;">Steepest descent</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs039.html#more-on-steepest-descent" style="font-size: 80%;">More on Steepest descent</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs040.html#the-ideal" style="font-size: 80%;">The ideal</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs041.html#the-sensitiveness-of-the-gradient-descent" style="font-size: 80%;">The sensitiveness of the gradient descent</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs042.html#convex-functions" style="font-size: 80%;">Convex functions</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs043.html#convex-function" style="font-size: 80%;">Convex function</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs044.html#conditions-on-convex-functions" style="font-size: 80%;">Conditions on convex functions</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs045.html#more-on-convex-functions" style="font-size: 80%;">More on convex functions</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs046.html#some-simple-problems" style="font-size: 80%;">Some simple problems</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs047.html#revisiting-our-first-homework" style="font-size: 80%;">Revisiting our first homework</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs052.html#gradient-descent-example" style="font-size: 80%;">Gradient descent example</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs049.html#the-derivative-of-the-cost-loss-function" style="font-size: 80%;">The derivative of the cost/loss function</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs050.html#the-hessian-matrix" style="font-size: 80%;">The Hessian matrix</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs051.html#simple-program" style="font-size: 80%;">Simple program</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs052.html#gradient-descent-example" style="font-size: 80%;">Gradient Descent Example</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs053.html#and-a-corresponding-example-using-scikit-learn" style="font-size: 80%;">And a corresponding example using <b>scikit-learn</b></a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs054.html#gradient-descent-and-ridge" style="font-size: 80%;">Gradient descent and Ridge</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs055.html#the-hessian-matrix-for-ridge-regression" style="font-size: 80%;">The Hessian matrix for Ridge Regression</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs056.html#program-example-for-gradient-descent-with-ridge-regression" style="font-size: 80%;">Program example for gradient descent with Ridge Regression</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs057.html#using-gradient-descent-methods-limitations" style="font-size: 80%;">Using gradient descent methods, limitations</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs058.html#challenge-yourself-the-coming-weekend" style="font-size: 80%;">Challenge yourself the coming weekend</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs059.html#lab-session-material-from-last-week-and-relevant-for-the-first-project" style="font-size: 80%;">Lab session: Material from last week and relevant for the first project</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs060.html#various-steps-in-cross-validation" style="font-size: 80%;">Various steps in cross-validation</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs061.html#how-to-set-up-the-cross-validation-for-ridge-and-or-lasso" style="font-size: 80%;">How to set up the cross-validation for Ridge and/or Lasso</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs062.html#cross-validation-in-brief" style="font-size: 80%;">Cross-validation in brief</a></li>
|
|
<!-- navigation toc: --> <li><a href="._week38-bs063.html#code-example-for-cross-validation-and-k-fold-cross-validation" style="font-size: 80%;">Code Example for Cross-validation and \( k \)-fold Cross-validation</a></li>
|
|
|
|
</ul>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
</div> <!-- end of navigation bar -->
|
|
<div class="container">
|
|
<p> </p><p> </p><p> </p> <!-- add vertical space -->
|
|
<a name="part0000"></a>
|
|
<!-- ------------------- main content ---------------------- -->
|
|
<div class="jumbotron">
|
|
<center>
|
|
<h1>Week 38: Logistic Regression and Optimization</h1>
|
|
</center> <!-- document title -->
|
|
|
|
<!-- author(s): Morten Hjorth-Jensen -->
|
|
<center>
|
|
<b>Morten Hjorth-Jensen</b> [1, 2]
|
|
</center>
|
|
<!-- institution(s) -->
|
|
<center>
|
|
[1] <b>Department of Physics and Center for Computing in Science Education, University of Oslo</b>
|
|
</center>
|
|
<center>
|
|
[2] <b>Department of Physics and Astronomy and Facility for Rare Isotope Beams, Michigan State University</b>
|
|
</center>
|
|
<br>
|
|
<center>
|
|
<h4>September 16-20, 2024</h4>
|
|
</center> <!-- date -->
|
|
<br>
|
|
|
|
|
|
|
|
<p><a href="._week38-bs001.html" class="btn btn-primary btn-lg">Read »</a></p>
|
|
|
|
|
|
</div> <!-- end jumbotron -->
|
|
|
|
<p>
|
|
<!-- navigation buttons at the bottom of the page -->
|
|
<ul class="pagination">
|
|
<li class="active"><a href="._week38-bs000.html">1</a></li>
|
|
<li><a href="._week38-bs001.html">2</a></li>
|
|
<li><a href="._week38-bs002.html">3</a></li>
|
|
<li><a href="._week38-bs003.html">4</a></li>
|
|
<li><a href="._week38-bs004.html">5</a></li>
|
|
<li><a href="._week38-bs005.html">6</a></li>
|
|
<li><a href="._week38-bs006.html">7</a></li>
|
|
<li><a href="._week38-bs007.html">8</a></li>
|
|
<li><a href="._week38-bs008.html">9</a></li>
|
|
<li><a href="._week38-bs009.html">10</a></li>
|
|
<li><a href="">...</a></li>
|
|
<li><a href="._week38-bs063.html">64</a></li>
|
|
<li><a href="._week38-bs001.html">»</a></li>
|
|
</ul>
|
|
<!-- ------------------- end of main content --------------- -->
|
|
</div> <!-- end container -->
|
|
<!-- include javascript, jQuery *first* -->
|
|
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
|
|
<script src="https://netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
|
|
<!-- Bootstrap footer
|
|
<footer>
|
|
<a href="https://..."><img width="250" align=right src="https://..."></a>
|
|
</footer>
|
|
-->
|
|
<center style="font-size:80%">
|
|
<!-- copyright --> © 1999-2024, Morten Hjorth-Jensen. Released under CC Attribution-NonCommercial 4.0 license
|
|
</center>
|
|
</body>
|
|
</html>
|
|
|