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Read an Excel file directly from a R script
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Yes. See the relevant page on the R wiki. Short answer: read.xls from the gdata package works most of the time (although you need to have Perl installed on your system -- usually already true on MacOS and Linux, but takes an extra step on Windows, i.e. see http://strawberryperl.com/). Ther...
Get only part of an Array in Java?
...thon you can do something like this array[index:] and it returns the array from the index. Is something like this possible in Java.
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Cosine Similarity between 2 Number Lists
...utes the distance, and not the similarity. So, you must subtract the value from 1 to get the similarity.
from scipy import spatial
dataSetI = [3, 45, 7, 2]
dataSetII = [2, 54, 13, 15]
result = 1 - spatial.distance.cosine(dataSetI, dataSetII)
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How to write a Python module/package?
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would that last one be: from HellowModule import hellomodule? Could that be hello in the module folder, so it would be from HelloModule import hello
– nycynik
Feb 22 '15 at 13:33
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Take a char input from the Scanner
I am trying to find a way to take a char input from the keyboard.
22 Answers
22
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Returning first x items from array
I want to return first 5 items from array. How can I do this?
5 Answers
5
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How do you fix a bad merge, and replay your good commits onto a fixed merge?
...go, without me noticing it until now. I want to completely delete the file from the repository history.
12 Answers
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Access event to call preventdefault from custom function originating from onclick attribute of tag
...commended as it will also prevent all other event handlers on that element from running, and stop the event from bubbling up to higher elements.
– Stijn de Witt
Nov 6 '15 at 13:22
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How can I convert an RGB image into grayscale in Python?
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How about doing it with Pillow:
from PIL import Image
img = Image.open('image.png').convert('LA')
img.save('greyscale.png')
Using matplotlib and the formula
Y' = 0.2989 R + 0.5870 G + 0.1140 B
you could do:
import numpy as np
import matplotlib.pypl...
Android image caching
How can I cache images after they are downloaded from web?
18 Answers
18
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