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st: Substituting submatrix

From   Rachel <>
To   statalist <>
Subject   st: Substituting submatrix
Date   Thu, 23 Aug 2007 21:47:34 -0400

How can one efficiently replace a submatrix in Stata?  For example,
suppose we have C, an 6x6 identity matrix and would like to subsitute
[3,4\5,6]  as the upper left 2x2 submatrix.

I've tried mat C[1..2,1..2]=3,4\5,6

but this leads to a syntax error.

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