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st: RE: submatrix

From   Nick Cox <>
To   "''" <>
Subject   st: RE: submatrix
Date   Tue, 15 Nov 2011 10:03:31 +0000

This is covered by the help on -matrix extraction- 

matrix new = b[1..9, 7..9] 

The = operator for assignment should be used (not ==). 


behailu ayele

I have problem extracting parts of a matrix I estimated.

my matrix e(b) is  9 by 9. Now I want to extract the first line and I did this.

matrix b=e(b)
and then
 matrix new==b[1,1..9]

my problem is  when i want to have a 3 by 9 matrix of the last three columns

is this not what I am supposed to do?

matrix new==b[7/9,1..9]

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