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Two thirds histogram Ruby


Your question is unclear. This?

a =
[0,1,2,2,2,2,2,3,3,3,3,3,3,4,4,4,4,5,5,6,6,6,7,7,7,7,7,8,9,9,10]
tab1 = proc { Hash[a.group_by{ |v| v }.map{ |k, v|
[k, v.size] }] }
t1 = Thread.new(&tab1)
t2 = Thread.new(&tab1)
p t1.value
p t2.value

Categories : Ruby

Related to : Two thirds histogram Ruby
Histogram returning inf values
You probably have some irrational number in your y array like nan or inf. You didn't post all of the values, so you have to check yourself. you can also do this by: pylab.isnan(y).any() and pylab.isinf(y).any() Good luck

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Using pyplot to draw histogram
Histograms do not usually show you probabilities, they show the count or frequency of observations within different intervals of values, called bins. pyplot defines interval or bins by splitting the range between the minimum and maximum value of your array into n equally sized bins, where n is the number you specified with argument : bins = 1. So, in this case your histogram has a single bin whic

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Computing Histogram of Oriented Gradients
The third parameter channels in the call to cv::calcHist(...) should not be 0 (which makes it a null pointer). OpenCV expects here a pointer to an array of indices depicting the channels of interest. Since you want to use the first channels (index 0), your code should look like this: int channels[] = { 0 }; calcHist(&cell_fourPx, 1, channels, ...);

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Matplotlib xticks not lining up with histogram
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