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How to calculate moving average using NumPy?
...[n:] = ret[n:] - ret[:-n]
return ret[n - 1:] / n
>>> a = np.arange(20)
>>> moving_average(a)
array([ 1., 2., 3., 4., 5., 6., 7., 8., 9., 10., 11.,
12., 13., 14., 15., 16., 17., 18.])
>>> moving_average(a, n=4)
array([ 1.5, 2.5, 3....
Increase number of axis ticks
...different scales of numbers, i.e., 0.5 is a good value for this data which range is c(-3,3), but it's not a good range for a data which range is c(0,5000). Is there some function that calculates it?
– João Daniel
Jul 4 '12 at 22:33
...
What does the “at” (@) symbol do in Python?
...lf, B):
A = self
return Mat([[sum(A[i][k]*B[k][j] for k in range(len(B)))
for j in range(len(B[0])) ] for i in range(len(A))])
A = Mat([[1,3],[7,5]])
B = Mat([[6,8],[4,2]])
print(A @ B)
This code yields:
[[18, 14], [62, 66]]
...
convert UIImage to NSData
... (
UIImage *image
);
Here the docs.
EDIT:
if you want to access the raw bytes that make up the UIImage, you could use this approach:
CGDataProviderRef provider = CGImageGetDataProvider(image.CGImage);
NSData* data = (id)CFBridgingRelease(CGDataProviderCopyData(provider));
const uint8_t* byte...
Java RegEx meta character (.) and ordinary dot?
...ng the regex. if hardcoded you do need to use: "\\." , if reading from a raw source (e.g. text file) you use only a single backslash: \.
– Paul
Apr 8 '16 at 14:21
add a com...
Save bitmap to location
... @HeinduPlessis Don't have to but you probably should. Saving the raw bitmap will take much more space, depending on the format (ARGB_4444 vs ARGB_8888 for example).
– irwinb
Apr 13 '13 at 15:57
...
Only detect click event on pseudo-element
...s X and Y also relative to the document.
Therefore, I can come up with a range of "clickable" region on the entire page that never changes.
Here's my demo on codepen.
or if too lazy for codepen, here's the JS:
* I only cared about the Y values for my example.
var box = $('.box');
// clicka...
Convert an image (selected by path) to base64 string
...ng (MemoryStream m = new MemoryStream())
{
image.Save(m, image.RawFormat);
byte[] imageBytes = m.ToArray();
// Convert byte[] to Base64 String
string base64String = Convert.ToBase64String(imageBytes);
return base64String;
}
}
...
Convert a 1D array to a 2D array in numpy
...esize function and mixing it with np.reshape, such as
>>> a =np.arange(9)
>>> np.resize(a, 10).reshape(5,2)
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How to display line numbers in 'less' (GNU)
...
The options are: R = better handling of raw color codes in files. S = Scroll long lines off the screen instead of word wrap. #3 = scroll right/left by 3 positions at a time. N = show line numbers. M = Longer prompts. ~ = Instead of displaying empty space after a f...