st: How define an asymmetric matrix on .dta file as an asymmetric matrix in Stata?

[Erik Aadland <erikaadland@hotmail.com>]

Dear statalist.
 
I have fairly large asymmetric matrices (e.g. 200 by 200) from which I want to compute eigenvalues using the command:
 
matrix eigenvalues r c = A
 
Each of my asymmetric matrices are stored as separate .dta files and have the following general structure:
 
   A  B  C   D
A  0  0  1   0
B  2  0  0   1
C  3  1  0   2
D  1  0  2   0
 
How do I define each of these .dta files as the asymmetric matrix A so that Stata understands that the matrix in the .dta file is in fact an asymmetric matrix? As far as I can see, I need to do this in order to execute the command: matrix eigenvalues r c = A
 
 
Is there a simple command/way to accomplish this?
 
Thank you and kind regards,
 
Erik. 		 	   		  
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