Here is strength of materials data taken from a textbook.
data =: 33190 32320 23040 24050
data =: data, 31860 33020 30930 30170
data =: data, 32590 32030 32720 31300
data =: data, 26520 30460 33650 28730
data =: data, 33280 32700 32340 31920
And here is a "stemplot" of the data
2 stemplot data
23 0
24 0
25
26 5
27
28 7
29
30 1 4 9
31 3 8 9
32 0 3 3 5 7 7
33 0 1 2 6
This is a "histogram" in which the first two data digits are labels and
third digits form the bars of the histogram. The last line, beginning
33, means there are data values beginning with 330 , 331, 332, and 336.
The plot was originally called "stem and leaf" -- "stem" is the
two-digit column and "leaves" are the individual third digits.
Your mission, should you decide to accept it, is to write verb stemplot.
Above, 2 stemplot data means trim two digits from the data (that's
what the 2 is for), then produce the character array shown. Assume
non-negative integer data. What does your verb do with
_1 stemplot 2 1 4 2 6
?
--Kip Murray
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