Mathematica 7: Histogram Y-axis range?

*To*: mathgroup at smc.vnet.net*Subject*: [mg93862] Mathematica 7: Histogram Y-axis range?*From*: Gordon Robertson <grobertson at bcgsc.ca>*Date*: Thu, 27 Nov 2008 05:31:45 -0500 (EST)

I've corrected and adjusted the text below. G -- I'm using Mathematica 7 on an Intel Mac with OSX 10.5.5. L3111-1191. I'm finding unexpected behaviour in Mathemaitca 7's Histogram function, as I try to generate a histogram that worked routinely in Mathematica 6, many times, over the past few months. I have a list of ~2400 real numbers ('mCtrs') whose values are concentrated in a range that will be near the centre of the Histogram's X-axis. I generate a histogram with this: plusMinus = 200; hDtoC = Histogram[mCtrs, {-plusMinus, plusMinus, 10}] Unexpectedly, the Y-axis terminates at ~90, and the pale blue bars at the centre of the histogram extend above this upper limit, which is not at all presentable. For such a plot, Mathematica 6 automatically extended the Y-axis to include the bars fully. Looking at the Help documentation, I do not see a switch that would let me ask to see 'All' of the histogram's Y-range. An hour ago, the same code gave a correct histogram for an input list that was somewhat =less= concentrated near the centre of the histogram. This makes me wonder whether there's some auto-range-clipping that's causing the problem. But the test case below makes me doubt this. -- If I test the 2400 input values, they are 'numbers', as expected: tnq = Table[NumberQ[motifCtrs[[i]]], {i, Length[motifCtrs]}]; Tally[tnq] {{True, 2394}} -- If I generate a test case, with highly concentrated central values, I see the full range of bar heights is displayed, as expected (and as in Mathematica 6): testCtrs = RandomReal[{-5, 5}, 10000]; testCtrs1 = Flatten[Prepend[testCtrs, {-100, 100}]]; Histogram[testCtrs1, {-plusMinus, plusMinus, 10}] G -- Gordon Robertson Gene Regulation Informatics Canada's Michael Smith Genome Sciences Centre Vancouver BC Canada www.bcgsc.ca

**Follow-Ups**:**Re: Mathematica 7: Histogram Y-axis range?***From:*Murray Eisenberg <murray@math.umass.edu>