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st: defining matrices in Mata


From   Christopher Baum <kit.baum@bc.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: defining matrices in Mata
Date   Tue, 3 Jan 2012 10:29:37 -0500

Dear tech support,

I am using Stata 12/MP4, s/n  5012041613, fully updated. I have some code in an ado-file that defines a somewhat sizable table of critical values for a statistical test. I would like to define this in a Mata function, rather than an ado-file, so that it may be compiled. However, when I try to define that matrix in Mata, it runs into (undocumented) size limits on the number of tokens (at about 246 elements):

clear all
mata:
void cdsy( )
{
 real matrix ivbias5
 
 ivbias5  = ( 
  . , . , . \ 
  . , . , . \ 
  13.91 , . , . \ 
  16.85 , 11.04 , . \ 
  18.37 , 13.97 , 9.53  \
  19.28 , 15.72 , 12.20 \ 
  19.86 , 16.88 , 13.95 \ 
  20.25 , 17.70 , 15.18 \ 
  20.53 , 18.30 , 16.10 \ 
  20.74 , 18.76 , 16.80 \ 
  20.90 , 19.12 , 17.35 \ 
  21.01 , 19.40 , 17.80 \ 
  21.10 , 19.64 , 18.17 \ 
  21.18 , 19.83 , 18.47 \ 
  21.23 , 19.98 , 18.73 \ 
  21.28 , 20.12 , 18.94 \ 
  21.31 , 20.23 , 19.13 \ 
  21.34 , 20.33 , 19.29 \ 
  21.36 , 20.41 , 19.44 \ 
  21.38 , 20.48 , 19.56 \ 
  21.39 , 20.54 , 19.67 \ 
  21.40 , 20.60 , 19.77 \ 
  21.41 , 20.65 , 19.86 \ 
  21.41 , 20.69 , 19.94 \ 
  21.42 , 20.73 , 20.01 \ 
  21.42 , 20.76 , 20.07 \ 
  21.42 , 20.79 , 20.13 \ 
  21.42 , 20.82 , 20.18 \ 
  21.42 , 20.84 , 20.23 \ 
  21.42 , 20.86 , 20.27 \ 
  21.41 , 20.88 , 20.31 \ 
  21.41 , 20.90 , 20.35 \ 
  21.41 , 20.91 , 20.38 \ 
  21.40 , 20.93 , 20.41 \ 
  21.40 , 20.94 , 20.44 \ 
  21.39 , 20.95 , 20.47 \ 
  21.39 , 20.96 , 20.49 \ 
  21.38 , 20.97 , 20.51 \ 
  21.38 , 20.98 , 20.54 \ 
  21.37 , 20.99 , 20.56 \ 
  21.37 , 20.99 , 20.57 \ 
  21.36 , 21.00 , 20.59 \ 
  21.35 , 21.00 , 20.61 \ 
  21.35 , 21.01 , 20.62 \ 
  21.34 , 21.01 , 20.64 \ 
  21.34 , 21.02 , 20.65 \ 
  21.33 , 21.02 , 20.66 \ 
  21.32 , 21.02 , 20.67 \ 
  21.32 , 21.03 , 20.68 \ 
  21.31 , 21.03 , 20.69 \ 
  21.31 , 21.03 , 20.70 \ 
  21.30 , 21.03 , 20.71 \ 
  21.30 , 21.03 , 20.72 \ 
  21.29 , 21.03 , 20.73 \ 
  21.28 , 21.03 , 20.73 \ 
  21.28 , 21.04 , 20.74 \ 
  21.27 , 21.04 , 20.75 \ 
  21.27 , 21.04 , 20.75 \ 
  21.26 , 21.04 , 20.76 \ 
  21.26 , 21.04 , 20.76 \ 
  21.25 , 21.04 , 20.77 \ 
  21.24 , 21.04 , 20.77 \ 
  21.24 , 21.04 , 20.78 \ 
  21.23 , 21.04 , 20.78 \ 
  21.23 , 21.03 , 20.79 \ 
  21.22 , 21.03 , 20.79 \ 
  21.22 , 21.03 , 20.79 \ 
  21.21 , 21.03 , 20.80 \ 
  21.21 , 21.03 , 20.80 \ 
  21.20 , 21.03 , 20.80 \ 
  21.20 , 21.03 , 20.80 \ 
  21.19 , 21.03 , 20.81 \ 
  21.19 , 21.03 , 20.81 \ 
  21.18 , 21.03 , 20.81 \ 
  21.18 , 21.02 , 20.81 \ 
  21.17 , 21.02 , 20.82 \ 
  21.17 , 21.02 , 20.82 \ 
  21.16 , 21.02 , 20.82 \ 
  21.16 , 21.02 , 20.82 \ 
  21.15 , 21.02 , 20.82 \ 
  21.15 , 21.02 , 20.82 \ 
  21.15 , 21.02 , 20.83 \ 
  21.14 , 21.01 , 20.83 \ 
  21.14 , 21.01 , 20.83 \ 
  21.13 , 21.01 , 20.83 \ 
  21.13 , 21.01 , 20.83 \ 
  21.12 , 21.01 , 20.84 \ 
  21.12 , 21.01 , 20.84 \ 
  21.11 , 21.01 , 20.84 \ 
  21.11 , 21.01 , 20.84 \ 
  21.10 , 21.00 , 20.84 \ 
  21.10 , 21.00 , 20.84 \ 
  21.09 , 21.00 , 20.85 \ 
  21.09 , 21.00 , 20.85 \ 
  21.08 , 21.00 , 20.85 \ 
  21.08 , 21.00 , 20.85 \ 
  21.07 , 21.00 , 20.85 \ 
  21.07 , 20.99 , 20.86 \ 
  21.06 , 20.99 , 20.86 \ 
  21.06 , 20.99 , 20.86 )

 ivbias5
}
end

How can I define a matrix of this (admittedly not very large) size in Mata? I don't want to refer to a Stata matrix, as that would defeat the whole purpose of putting these
matrix definitions into Mata compiled code.

Happy new year!

Cheers
Kit


Kit Baum   |   Boston College Economics & DIW Berlin   |   http://ideas.repec.org/e/pba1.html
                             An Introduction to Stata Programming  |   http://www.stata-press.com/books/isp.html
  An Introduction to Modern Econometrics Using Stata  |   http://www.stata-press.com/books/imeus.html


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