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	<title>random &#8211; Alan Richmond</title>
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	<link>https://tuxar.uk</link>
	<description>Scientific systems programmer (ex NASA, ESA/ESO, Hubble), web developer, online retailer (retired)</description>
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	<title>random &#8211; Alan Richmond</title>
	<link>https://tuxar.uk</link>
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	<item>
		<title>Multi-pendulum Harmonograph simulator using numpy and matplotlib</title>
		<link>https://tuxar.uk/multi-pendulum-harmonograph-simulator-using-numpy-and-matplotlib/</link>
					<comments>https://tuxar.uk/multi-pendulum-harmonograph-simulator-using-numpy-and-matplotlib/#comments</comments>
		
		<dc:creator><![CDATA[Alan]]></dc:creator>
		<pubDate>Thu, 22 Jun 2017 11:40:04 +0000</pubDate>
				<category><![CDATA[Harmonograph]]></category>
		<category><![CDATA[Pyplot]]></category>
		<category><![CDATA[graphics]]></category>
		<category><![CDATA[matplotlib]]></category>
		<category><![CDATA[numpy]]></category>
		<category><![CDATA[random]]></category>
		<guid isPermaLink="false">http://python3.codes/?p=829</guid>

					<description><![CDATA[This is a simple harmonograph simulator to generate random-ish harmonographs. It asks for the number of pendulums, and exits if... <span class="gridview-grid-post-read-more"><a href="https://tuxar.uk/multi-pendulum-harmonograph-simulator-using-numpy-and-matplotlib/">read more<span class="gridview-sr-only"> Multi-pendulum Harmonograph simulator using numpy and matplotlib</span></a></span>]]></description>
		
					<wfw:commentRss>https://tuxar.uk/multi-pendulum-harmonograph-simulator-using-numpy-and-matplotlib/feed/</wfw:commentRss>
			<slash:comments>2</slash:comments>
		
		
			</item>
		<item>
		<title>A Neural Network in Python, Part 2: activation functions, bias, SGD, etc.</title>
		<link>https://tuxar.uk/a-neural-network-in-python-part-2-activation-functions-bias-sgd-etc/</link>
					<comments>https://tuxar.uk/a-neural-network-in-python-part-2-activation-functions-bias-sgd-etc/#comments</comments>
		
		<dc:creator><![CDATA[Alan]]></dc:creator>
		<pubDate>Thu, 09 Feb 2017 14:38:43 +0000</pubDate>
				<category><![CDATA[Advanced]]></category>
		<category><![CDATA[Artificial Intelligence]]></category>
		<category><![CDATA[AI]]></category>
		<category><![CDATA[dict]]></category>
		<category><![CDATA[graphics]]></category>
		<category><![CDATA[lambda]]></category>
		<category><![CDATA[matplotlib]]></category>
		<category><![CDATA[matrices]]></category>
		<category><![CDATA[neural network]]></category>
		<category><![CDATA[numpy]]></category>
		<category><![CDATA[random]]></category>
		<category><![CDATA[sin]]></category>
		<guid isPermaLink="false">http://python3.codes/?p=774</guid>

					<description><![CDATA[This is Part 2 of A Neural Network in Python, which was a very simple neural network to learn the... <span class="gridview-grid-post-read-more"><a href="https://tuxar.uk/a-neural-network-in-python-part-2-activation-functions-bias-sgd-etc/">read more<span class="gridview-sr-only"> A Neural Network in Python, Part 2: activation functions, bias, SGD, etc.</span></a></span>]]></description>
		
					<wfw:commentRss>https://tuxar.uk/a-neural-network-in-python-part-2-activation-functions-bias-sgd-etc/feed/</wfw:commentRss>
			<slash:comments>1</slash:comments>
		
		
			</item>
		<item>
		<title>A Neural Network in Python, Part 1: sigmoid function, gradient descent &#038; backpropagation</title>
		<link>https://tuxar.uk/neural-network-python-part-1-sigmoid-function-gradient-descent-backpropagation/</link>
					<comments>https://tuxar.uk/neural-network-python-part-1-sigmoid-function-gradient-descent-backpropagation/#comments</comments>
		
		<dc:creator><![CDATA[Alan]]></dc:creator>
		<pubDate>Tue, 31 Jan 2017 15:10:22 +0000</pubDate>
				<category><![CDATA[Advanced]]></category>
		<category><![CDATA[Artificial Intelligence]]></category>
		<category><![CDATA[matplotlib]]></category>
		<category><![CDATA[numpy]]></category>
		<category><![CDATA[random]]></category>
		<guid isPermaLink="false">http://python3.codes/?p=719</guid>

					<description><![CDATA[In this article, I&#8217;ll show you a toy example to learn the XOR logical function. My objective is to make it... <span class="gridview-grid-post-read-more"><a href="https://tuxar.uk/neural-network-python-part-1-sigmoid-function-gradient-descent-backpropagation/">read more<span class="gridview-sr-only"> A Neural Network in Python, Part 1: sigmoid function, gradient descent &#038; backpropagation</span></a></span>]]></description>
		
					<wfw:commentRss>https://tuxar.uk/neural-network-python-part-1-sigmoid-function-gradient-descent-backpropagation/feed/</wfw:commentRss>
			<slash:comments>4</slash:comments>
		
		
			</item>
		<item>
		<title>Have we already seen this number? (deja vu again)</title>
		<link>https://tuxar.uk/already-seen-number/</link>
					<comments>https://tuxar.uk/already-seen-number/#respond</comments>
		
		<dc:creator><![CDATA[Alan]]></dc:creator>
		<pubDate>Fri, 08 Apr 2016 15:35:42 +0000</pubDate>
				<category><![CDATA[Beginner]]></category>
		<category><![CDATA[Numbers]]></category>
		<category><![CDATA[dict]]></category>
		<category><![CDATA[fractal]]></category>
		<category><![CDATA[function]]></category>
		<category><![CDATA[random]]></category>
		<category><![CDATA[range]]></category>
		<guid isPermaLink="false">http://python3.codes/?p=629</guid>

					<description><![CDATA[I had a phone interview for a Python job the other day. It started out really well, he was very... <span class="gridview-grid-post-read-more"><a href="https://tuxar.uk/already-seen-number/">read more<span class="gridview-sr-only"> Have we already seen this number? (deja vu again)</span></a></span>]]></description>
		
					<wfw:commentRss>https://tuxar.uk/already-seen-number/feed/</wfw:commentRss>
			<slash:comments>0</slash:comments>
		
		
			</item>
		<item>
		<title>Hello World 2, in Python 3</title>
		<link>https://tuxar.uk/hello-world-2-in-python-3/</link>
					<comments>https://tuxar.uk/hello-world-2-in-python-3/#respond</comments>
		
		<dc:creator><![CDATA[Alan]]></dc:creator>
		<pubDate>Thu, 24 Mar 2016 12:44:03 +0000</pubDate>
				<category><![CDATA[Beginner]]></category>
		<category><![CDATA[assignment]]></category>
		<category><![CDATA[conditionals]]></category>
		<category><![CDATA[import]]></category>
		<category><![CDATA[print]]></category>
		<category><![CDATA[random]]></category>
		<guid isPermaLink="false">http://python3.codes/?p=87</guid>

					<description><![CDATA[Hello World is the famous minimal introductory program for many programming languages. But as soon as it&#8217;s served its purpose, it&#8217;s discarded... <span class="gridview-grid-post-read-more"><a href="https://tuxar.uk/hello-world-2-in-python-3/">read more<span class="gridview-sr-only"> Hello World 2, in Python 3</span></a></span>]]></description>
		
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			<slash:comments>0</slash:comments>
		
		
			</item>
		<item>
		<title>Spectral Harmonographs</title>
		<link>https://tuxar.uk/spectral-harmonographs-2/</link>
					<comments>https://tuxar.uk/spectral-harmonographs-2/#comments</comments>
		
		<dc:creator><![CDATA[Alan]]></dc:creator>
		<pubDate>Mon, 05 Oct 2015 11:24:25 +0000</pubDate>
				<category><![CDATA[Harmonograph]]></category>
		<category><![CDATA[Intermediate]]></category>
		<category><![CDATA[color]]></category>
		<category><![CDATA[graphics]]></category>
		<category><![CDATA[math]]></category>
		<category><![CDATA[pygame]]></category>
		<category><![CDATA[random]]></category>
		<category><![CDATA[simulation]]></category>
		<category><![CDATA[sin]]></category>
		<guid isPermaLink="false">http://python3.codes/?p=573</guid>

					<description><![CDATA[This Python + Pygame program draws the trace of 4 decaying sine waves, 2 per axis, with rainbow colours. It... <span class="gridview-grid-post-read-more"><a href="https://tuxar.uk/spectral-harmonographs-2/">read more<span class="gridview-sr-only"> Spectral Harmonographs</span></a></span>]]></description>
		
					<wfw:commentRss>https://tuxar.uk/spectral-harmonographs-2/feed/</wfw:commentRss>
			<slash:comments>3</slash:comments>
		
		
			</item>
		<item>
		<title>Number guessing game</title>
		<link>https://tuxar.uk/number-guessing-game/</link>
					<comments>https://tuxar.uk/number-guessing-game/#respond</comments>
		
		<dc:creator><![CDATA[Alan]]></dc:creator>
		<pubDate>Thu, 01 Oct 2015 08:04:02 +0000</pubDate>
				<category><![CDATA[Basic]]></category>
		<category><![CDATA[Numbers]]></category>
		<category><![CDATA[boolean]]></category>
		<category><![CDATA[conditionals]]></category>
		<category><![CDATA[data types]]></category>
		<category><![CDATA[for]]></category>
		<category><![CDATA[import]]></category>
		<category><![CDATA[libraries]]></category>
		<category><![CDATA[loop]]></category>
		<category><![CDATA[print]]></category>
		<category><![CDATA[random]]></category>
		<category><![CDATA[range]]></category>
		<category><![CDATA[search]]></category>
		<category><![CDATA[simulation]]></category>
		<guid isPermaLink="false">http://python3.codes/?p=12</guid>

					<description><![CDATA[The number guessing game incorporates several simple but important elements of elementary programming and is a good candidate for an... <span class="gridview-grid-post-read-more"><a href="https://tuxar.uk/number-guessing-game/">read more<span class="gridview-sr-only"> Number guessing game</span></a></span>]]></description>
		
					<wfw:commentRss>https://tuxar.uk/number-guessing-game/feed/</wfw:commentRss>
			<slash:comments>0</slash:comments>
		
		
			</item>
		<item>
		<title>A Graphical Dice Simulator</title>
		<link>https://tuxar.uk/a-graphical-dice-simulator/</link>
		
		<dc:creator><![CDATA[Alan]]></dc:creator>
		<pubDate>Sun, 31 May 2015 14:07:07 +0000</pubDate>
				<category><![CDATA[Beginner]]></category>
		<category><![CDATA[Games]]></category>
		<category><![CDATA[conditionals]]></category>
		<category><![CDATA[graphics]]></category>
		<category><![CDATA[libraries]]></category>
		<category><![CDATA[modulo]]></category>
		<category><![CDATA[pygame]]></category>
		<category><![CDATA[random]]></category>
		<category><![CDATA[range]]></category>
		<category><![CDATA[RGB]]></category>
		<category><![CDATA[simulation]]></category>
		<guid isPermaLink="false">http://python3.codes/?p=328</guid>

					<description><![CDATA[This PyGame program simulates the roll of a die (or dice if you prefer). It&#8217;s a fairly simple, straightforward thing... <span class="gridview-grid-post-read-more"><a href="https://tuxar.uk/a-graphical-dice-simulator/">read more<span class="gridview-sr-only"> A Graphical Dice Simulator</span></a></span>]]></description>
		
		
		
			</item>
		<item>
		<title>Extensible Harmonograph</title>
		<link>https://tuxar.uk/extensible-harmonograph/</link>
		
		<dc:creator><![CDATA[Alan]]></dc:creator>
		<pubDate>Mon, 18 May 2015 13:35:54 +0000</pubDate>
				<category><![CDATA[Harmonograph]]></category>
		<category><![CDATA[Intermediate]]></category>
		<category><![CDATA[colorsys]]></category>
		<category><![CDATA[function]]></category>
		<category><![CDATA[graphics]]></category>
		<category><![CDATA[math]]></category>
		<category><![CDATA[random]]></category>
		<category><![CDATA[simulation]]></category>
		<category><![CDATA[turtle]]></category>
		<guid isPermaLink="false">http://python3.codes/?p=273</guid>

					<description><![CDATA[Often seen in science museums, the harmonograph is a device that combines wave motions (e.g. from some pendulums) to move... <span class="gridview-grid-post-read-more"><a href="https://tuxar.uk/extensible-harmonograph/">read more<span class="gridview-sr-only"> Extensible Harmonograph</span></a></span>]]></description>
		
		
		
			</item>
		<item>
		<title>Binary Search</title>
		<link>https://tuxar.uk/binary-search/</link>
					<comments>https://tuxar.uk/binary-search/#comments</comments>
		
		<dc:creator><![CDATA[Alan]]></dc:creator>
		<pubDate>Mon, 27 Apr 2015 20:16:31 +0000</pubDate>
				<category><![CDATA[Basic]]></category>
		<category><![CDATA[Numbers]]></category>
		<category><![CDATA[def]]></category>
		<category><![CDATA[function]]></category>
		<category><![CDATA[list]]></category>
		<category><![CDATA[print]]></category>
		<category><![CDATA[random]]></category>
		<category><![CDATA[recursion]]></category>
		<guid isPermaLink="false">http://python3.codes/?p=108</guid>

					<description><![CDATA[Binary Search is one of the most fundamental computer algorithms. Given an ordered list of some data (names, numbers, &#8230;)... <span class="gridview-grid-post-read-more"><a href="https://tuxar.uk/binary-search/">read more<span class="gridview-sr-only"> Binary Search</span></a></span>]]></description>
		
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			<slash:comments>1</slash:comments>
		
		
			</item>
		<item>
		<title>Random Walk</title>
		<link>https://tuxar.uk/random-walk/</link>
					<comments>https://tuxar.uk/random-walk/#respond</comments>
		
		<dc:creator><![CDATA[Alan]]></dc:creator>
		<pubDate>Sat, 18 Apr 2015 16:52:46 +0000</pubDate>
				<category><![CDATA[Basic]]></category>
		<category><![CDATA[Turtle]]></category>
		<category><![CDATA[color]]></category>
		<category><![CDATA[colorsys]]></category>
		<category><![CDATA[random]]></category>
		<category><![CDATA[range]]></category>
		<category><![CDATA[turtle]]></category>
		<guid isPermaLink="false">http://python3.codes/?p=77</guid>

					<description><![CDATA[A colourful random walk. The basic idea is very simple: choose a random heading in the range 0:360 degrees. Step... <span class="gridview-grid-post-read-more"><a href="https://tuxar.uk/random-walk/">read more<span class="gridview-sr-only"> Random Walk</span></a></span>]]></description>
		
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			<slash:comments>0</slash:comments>
		
		
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