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python plot normal distribution
...math
mu = 0
variance = 1
sigma = math.sqrt(variance)
x = np.linspace(mu - 3*sigma, mu + 3*sigma, 100)
plt.plot(x, stats.norm.pdf(x, mu, sigma))
plt.show()
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Pairs from single list
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answered Jan 7 '11 at 17:35
Jochen RitzelJochen Ritzel
89.3k2525 gold badges181181 silver badges180180 bronze badges
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Uploading base64 encoded Image to Amazon S3 via Node.js
...native aws-sdk.
var AWS = require('aws-sdk');
AWS.config.loadFromPath('./s3_config.json');
var s3Bucket = new AWS.S3( { params: {Bucket: 'myBucket'} } );
inside your router method :-
ContentType should be set to the content type of the image file
buf = Buffer.from(req.body.imageBinary.replace(...
Rails 3.1 and Image Assets
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In 3.1 you just get rid of the 'images' part of the path. So an image that lives in /assets/images/example.png will actually be accessible in a get request at this url - /assets/example.png
Because the assets/images folder gets...
What is float in Java?
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In Java, when you type a decimal number as 3.6, its interpreted as a double. double is a 64-bit precision IEEE 754 floating point, while floatis a 32-bit precision IEEE 754 floating point. As a float is less precise than a double, the conversion cannot be performed i...
UIView with rounded corners and drop shadow?
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App Inventor 2 数学代码块 · App Inventor 2 中文网
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返回第一个数字的第二个数字次幂的结果。比如2^3 = 222 = 8
随机整数 (random integer)
返回给定值之间（包含首尾）的随机整数值。参数的顺序不限，也就是 1~100 和 100~1 效果一样。
随机小数 (random fraction)
返回 0 到 1 ...
jQuery get value of select onChange
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edited Aug 4 '18 at 15:53
moffeltje
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answered J...
Python dictionary: are keys() and values() always the same order?
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365
Found this:
If items(), keys(), values(),
iteritems(), iterkeys(), and
itervalues() ar...
How can I initialize a String array with length 0 in Java?
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232
As others have said,
new String[0]
will indeed create an empty array. However, there's one n...