Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: Create graph directly from matrix?


From   Nick Winter <nwinter@virginia.edu>
To   Stata List <statalist@hsphsun2.harvard.edu>
Subject   st: Create graph directly from matrix?
Date   Mon, 16 Nov 2009 11:38:14 -0500

Hi,

I'm wondering if there is a way to convert the values held into a matrix into a graph (ie, into a serset that serves as the basis for a graph) directly, without first making the matrix into variables?

Why I'm curious:

I'm thinking about revising my -oprobpr- command, which plots predicted probabilities after order l/probit models. The new -margins- command can fairly easily calculate what's required for the plotting, and those results can be saved as a matrix, using -margins-'s -post- option.

So I'd like to plot the estimates returned in e(b) against values in e(at).

I can put this stuff all together in one matrix, eg:

sysuse auto
probit foreign mpg price weight

margins, atmeans at(mpg=(12(2.9)41)) post
mat b = e(b)
mat X = e(at)
mat Xy = X , b'

Then I'd like to create, eg, a line plot of the final column (named y1) against the first column (mpg).

I can, of course, use -svmat-, graph the relevant variables, and drop the variables.

But I'd love a more elegant solution.

Cheers,
Nick Winter

--
--------------------------------------------------------------
Nicholas Winter                                 434.924.6994 t
Assistant Professor                             434.924.3359 f
Department of Politics                  nwinter@virginia.edu e
University of Virginia          faculty.virginia.edu/nwinter w
PO Box 400787, 100 Cabell Hall
Charlottesville, VA 22904

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index