This is a command line application, which was written in AWK and shows a histogram on your screen.
The histogram will be composed of a sample source data file.
$ echo "How to use it."
$ /path/to/histogram.awk /path/to/data/height
histogram
standard deviation:6.27148
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$ echo "NC means Number of Class. You can specify it."
$ /path/to/histogram.awk -v NC=10 /path/to/data/height
histogram
standard deviation:5.92398
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$