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Extracting the last n characters from a string in R
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288
I'm not aware of anything in base R, but it's straight-forward to make a function to do this us...
How to create a density plot in matplotlib?
...s np
from scipy.stats import gaussian_kde
data = [1.5]*7 + [2.5]*2 + [3.5]*8 + [4.5]*3 + [5.5]*1 + [6.5]*8
density = gaussian_kde(data)
xs = np.linspace(0,8,200)
density.covariance_factor = lambda : .25
density._compute_covariance()
plt.plot(xs,density(xs))
plt.show()
I get
which is pretty clos...
Structure padding and packing
... - unaligned memory access is slower on architectures that allow it (like x86 and amd64), and is explicitly prohibited on strict alignment architectures like SPARC.
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How do I calculate the date six months from the current date using the datetime Python module?
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1086
I found this solution to be good. (This uses the python-dateutil extension)
from datetime imp...
What is `mt=8` in iTunes links for the App Store?
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8 Answers
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Find the index of a dict within a list, by matching the dict's value
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answered Dec 8 '10 at 20:03
toklandtokland
58.5k1212 gold badges124124 silver badges159159 bronze badges
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How do I read / convert an InputStream into a String in Java?
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2581
A nice way to do this is using Apache commons IOUtils to copy the InputStream into a StringWrit...
JS Client-Side Exif Orientation: Rotate and Mirror JPEG Images
...on can be spotty 1 . The same source also provides a nice summary of the 8 different orientations a JPEG can have:
12 A...
How to change the order of DataFrame columns?
...]:
0 1 2 3 4 mean
0 0.445598 0.173835 0.343415 0.682252 0.582616 0.445543
1 0.881592 0.696942 0.702232 0.696724 0.373551 0.670208
2 0.662527 0.955193 0.131016 0.609548 0.804694 0.632596
3 0.260919 0.783467 0.593433 0.033426 0.5120...
Reshaping data.frame from wide to long format
...33
Jaap
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answered Feb 2 '10 at 16:07
AnikoAniko
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