st: Create graph directly from matrix?

[Nick Winter <nwinter@virginia.edu>]

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

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