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How do I plot in real-time in a while loop using matplotlib?
... version of the code in question (requires at least version Matplotlib 1.1.0 from 2011-11-14):
import numpy as np
import matplotlib.pyplot as plt
plt.axis([0, 10, 0, 1])
for i in range(10):
y = np.random.random()
plt.scatter(i, y)
plt.pause(0.05)
plt.show()
Note some of the changes...
Compare double to zero using epsilon
...there is a 52-bit mantissa and 11-bit exponent. Let's break it to bits:
1.0000 00000000 00000000 00000000 00000000 00000000 00000000 × 2^0 = 1
The smallest representable number greater than 1:
1.0000 00000000 00000000 00000000 00000000 00000000 00000001 × 2^0 = 1 + 2^-52
Therefore:
epsilon ...
How to access the ith column of a NumPy multidimensional array?
...
>>> test[:,0]
array([1, 3, 5])
Similarly,
>>> test[1,:]
array([3, 4])
lets you access rows. This is covered in Section 1.4 (Indexing) of the NumPy reference. This is quick, at least in my experience. It's certainly muc...
How do you match only valid roman numerals with a regular expression?
...
330
You can use the following regex for this:
^M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3...
Any reason not to use '+' to concatenate two strings?
...
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edited Jan 10 '16 at 12:44
seriousdev
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Version number comparison in Python
... cmp -like function which compares two version numbers and returns -1 , 0 , or 1 based on their compared valuses.
17 A...
How to set versionName in APK filename using gradle?
...Gradle Plugin
android {
compileSdkVersion 22
buildToolsVersion "22.0.1"
defaultConfig {
applicationId "com.company.app"
minSdkVersion 13
targetSdkVersion 21
versionCode 14 // increment with every release
versionName '1.4.8' // change with e...
How do I upgrade my ruby 1.9.2-p0 to the latest patch level using rvm?
My current version of ruby is ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.5.0] but I want to update it to the latest patch level using rvm. How can I do this?
...
What to do about Eclipse's “No repository found containing: …” error messages?
...
450
Quick answer
Go to Help → Install new software → Here uncheck “Contact all update sites d...
Does JavaScript have a method like “range()” to generate a range within the supplied bounds?
...
Numbers
[...Array(5).keys()];
=> [0, 1, 2, 3, 4]
Character iteration
String.fromCharCode(...[...Array('D'.charCodeAt(0) - 'A'.charCodeAt(0) + 1).keys()].map(i => i + 'A'.charCodeAt(0)));
=> "ABCD"
Iteration
for (const x of Array(5).keys()) {
co...