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st: Re overlaying normal curves over multiple histograms
From 
 
Jennifer Dent <[email protected]> 
To 
 
[email protected] 
Subject 
 
st: Re overlaying normal curves over multiple histograms 
Date 
 
Mon, 13 Aug 2012 17:37:38 +0100 
Hello,
I am trying to overlay two histograms, both with normal distributions 
added. I am able to add a normal line to the first histogram, and to add 
a second histogram using addplot, but I am not able to add a second 
normal line. Is there a way to do this? I want the y-axis presented as 
percentage (or frequency) and not density and wonder if this is where my 
problem might be?
My code, along with the error, is given below:
clear
set obs 10000
gen WE = rnormal(123.5, 17)
sort WE
gen SA = rnormal(127.9, 17)
sort SA
histogram WE, percent normal addplot(histogram SA, percent normal)
error: option normal not allowed r(198)
Many thanks in advance,
Jennifer Dent
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