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Understanding HistogramList result - number of bins

Posted 10 years ago

Dear colleagues, please help me understand this:

In[1]:= data = RandomVariate[NormalDistribution[0, 1], 200];
HistogramList[data, 3]

Out[2]= {{-4, -2, 0, 2, 4}, {5, 84, 109, 2}}

Why there are four and not three bins?

Thank you!

POSTED BY: Tomáš Hruš
2 Replies
Posted 10 years ago

Thank you!

POSTED BY: Tomáš Hruš


see this discussion:

Conclusion: you need to use the undocumented option "Raw".

HistogramList[data, {"Raw", 3}]

this gives the exact number of bins you want. Note that this comes with the usual health warning: it is an undocumented option and you use it at your own risk. The behaviour you see in the standard HistogramList command is apparently actually intended. Also note that the same thing works for the Histogram command.

HistogramList[data, {"Raw", 3}]


enter image description here



POSTED BY: Marco Thiel
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