I was reading the "Cartoon Guide to Statistics", and came across a description on "Stem and plot diagrams". (http://en.wikipedia.org/wiki/Stem-and-leaf_display.) It's sorta like a histogram diagram, but bundles by the ten's digit, and uses the one's digit as the "point".
Here's my attempt at describing it as a program: ########################################################### """ Stem and leaf plotting. http://en.wikipedia.org/wiki/Stem-and-leaf_display. """ import collections import sys def printStemPlot(values): """Prints a stem plot of the values.""" stems = collections.defaultdict(list) for v in values: stems[v / 10].append(v % 10) low, high = min(stems.keys()), max(stems.keys()) padding = len(str(high)) for i in range(low, high+1): stems[i].sort() print(str(i).ljust(padding) + ' | ' + ' '.join(map(str, stems[i])))def printStemPlot(values): if __name__ == "__main__": printStemPlot([int(n) for n in sys.argv[1:]]) ########################################################### For example: ########################################################### $ python stemplot.py 44 46 47 49 63 64 66 68 68 72 72 75 76 81 84 88 106 4 | 4 6 7 9 5 | 6 | 3 4 6 8 8 7 | 2 2 5 6 8 | 1 4 8 9 | 10 | 6 ########################################################### The program came out really short and sweet, especially with the use of collections.defaultdict, so I'm happy with it. Hope everyone's having a good weekend! _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
