
Re: Integer Length Count
Posted:
Nov 24, 2012 2:27 AM


On Friday, November 23, 2012 2:32:54 AM UTC6, sylvi...@comcast.net wrote: > I use a function in SAS that takes, in my case, a billion different integ= ers of varying length and counts the frequency of the length of each intege= r by converting the digits in the integers into alpha characters and counti= ng the frequency of the right most position of the alpha character. > > > > > > > > I am trying to do more and more routine programming in Mathematica and af= ter poking around in documentation for the past 4 hours have yet to find th= e parallel function in Mathematica for counting the integer frequency lengt= h in a big data set. My family wants me to drop everything and put the Turk= ey in the oven. My cat Sylvester even fell asleep on his back in front of t= he refrigerator with his little legs up in the air, so he want miss the tra= nsfer of the Turkey from the stove to the refrigerator. OH WELL  IT'S SHO= W TIME! > > > > > > > > Meanwhile, let me know any recommendations you have on a Mathematica func= tion that parallels the SAS Function. > > > > > > > > Sylvia Hobbs
Could take floor of logs base 10 to get the digit counts.
listofintegers =1+10^RandomInteger[{0,12},{100}];
Tally[Map[Floor[Log[10.,#]]&, listofintegers]]
Out[12]= {{6, 8}, {9, 6}, {11, 11}, {12, 8}, {7, 13}, {1, 8}, {8, 8}, {10, 8}, {2, 7}, {5, 9}, {3, 4}, {0, 5}, {4, 5}}
Daniel Lichtblau Wolfram Research

