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MathGroup Archive 2004

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histograms of identical distribution is different. maybe binnumber is the problem?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg51298] histograms of identical distribution is different. maybe binnumber is the problem?
  • From: sean kim <sean_incali at yahoo.com>
  • Date: Thu, 14 Oct 2004 06:35:12 -0400 (EDT)
  • Reply-to: sean_incali at yahoo.com
  • Sender: owner-wri-mathgroup at wolfram.com

i found the code attached below in the archives. it
will display two histograms without shading in one
graph.
 
note both histograms are generated exactly the same
way using exactly the same number of sample points.

for me, at least, it will show a pattern of a few of
the distributions having a lower number of points
about the mean. 

what causes this? I think it has to do with the way
histograms are made? is there a way to control bin
width or number in a convenient way? 

like.. 

binwidth-> (numberof points)/(whatever bin number you
want to use)

Do[
normdata = RandomArray[NormalDistribution[], 10000]; 
h1 = Histogram[normdata, BarEdgeStyle -> Hue[0],
BarStyle -> {}, DisplayFunction -> Identity];

normdata2 = RandomArray[NormalDistribution[], 10000]; 
h2 = Histogram[normdata2, BarStyle -> {},
DisplayFunction -> Identity];

DisplayTogether[h1, h2], 

{i, 10}]






		
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