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help for ^svmatf^
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Saves a matrix to a file
----------------------------

    ^svmatf^ ^, mat() fil(string) [row(string) varn(string) verb ]

Description
-----------

^svmatf^ saves a matrix as a dataset. It can be saved
as a separate dataset - or it can be added to an 
existing dataset.

The matrix can be added at the bottom (append) or
to the right of existing observations. 


Options
-------

^mat(^matrix^)^ specifies the matrix that is to be saved

^fil(string)^ is the name of the file that will contain
the matrix. If it exists, the data are appended.

^row^ specifies the variable name that will hold the
row numbers

^varn^ specifies the variable names of the matrix 
columns. If not specified, they will be taken from
the column names of the matrix

^verb^ is for verbose output, mostly debugging purposes.

Remarks 
-------
^svmatf^ can be used to store a series of related matrices 
stacked on top of each other in one file. 

The example shows how to compare results from a logistic regression 
models with different covariates.


Examples
--------

	.logit astma age gender
	.lrmatx
	.mat astma=r(or),r(ci)
	.svmatf , mat(astma) fil(result.dta) 

	.logit astma age gender region
	.lrmatx
	.mat astma=r(or),r(ci)
	.svmatf , mat(astma) fil(result.dta) 

	.logit astma age gender region hayfever
	.lrmatx
	.mat astma=r(or),r(ci)
	.svmatf , mat(astma) fil(result.dta)  


Authors
-------

    Jan Brogger, University of Bergen, Norway
    jan.brogger@@med.uib.no