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Re: st: plotting multiple normal densities

From   Nick Winter <>
Subject   Re: st: plotting multiple normal densities
Date   Tue, 31 Aug 2004 08:32:14 -0400

If you know the mean and standard deviation of each normal curve you want, you can just use -twoway function-. For example, to do two curves, with means 0 and 1, and standard deviations 1 and 3:

. graph twoway function normden(x, 0, 1) , range(-5 5) || ///
function normden(x, 1, 3) , range(-5 5)

--Nick Winter

At 12:59 PM 8/31/2004 +0100, you wrote:

I have a (mixed logit) model in which the mean and variance of
several variables' distributions are estimated. In all cases (so far)
these are normally distributed.

I want to plot these pdf's, so I use 'drawnorm' to draw from a
sample with the required mean and variance.

I can then plot these individually using the 'normal' option after
'hist', or using 'kdensity'.

However I want to plot >1 of these distributions on the same graph
to allow visual comparison.
Ideally it would not be a histogram, just the pdf plots.

Can anyone advise how this is done?

dan rigby

Dr Dan Rigby
Environmental Economist
School of Economic Studies
Manchester University
M13 9PL
0161 275 4808
*   For searches and help try:
Nicholas Winter 607.255.8819 t
Assistant Professor 607.255.4530 f
Department of Government e
308 White Hall w
Cornell University
Ithaca, NY 14853-4601

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