Dear StataList,

I have a question regarding bin width in histograms.

I cannot manage to create bins of equal width. It seems that Stata automatically adjusts bin widths, even when I explicitly set the width.

This can be seen in the code below (which uses the classic auto data in case one of you is kind enough to try):

clear all
sysuse auto
summarize price
twoway__histogram_gen price ///
, ///
percent width(300) start(3000) ///
gen (frequency bound)

keep bound frequency
order bound frequency

The "bound" variable is the midpoint of the bins, which is not increasing by a constant increment of 300.

Would you know what I am missing here?

My goal is to export the constant bins and corresponding percents to Excel, which is why I use "twoway histogram".

Many thanks for your consideration, and stay healthy.

Best regards,

Marc