How can i extract sub matrix from basic matrix

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Hello. My basic matrix is
B=[-1,1,1,5+i*2;0,-1,0,20+i*10;0,0,-1,10+i*3;1,0,0,0;30+i*30,50+i*50,60+i*60,0]
Sub matrix is A
A=[-1,1,1;0,-1,0;0,0,-1;1,0,0]

Accepted Answer

Walter Roberson
Walter Roberson on 7 Jun 2013
A = B(1:4, 1:3);
  2 Comments
welzheimerwald
welzheimerwald on 2 Apr 2022
@Dulam Sai Namratha Naidu it generates a 4x3 sub matrix of matrix B with rows 1,2,3,4 and colums 1,2,3 from matrix B.

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More Answers (1)

Navadeep Ganesh U
Navadeep Ganesh U on 1 Dec 2019
Edited: Navadeep Ganesh U on 1 Dec 2019
A=B([1,2,3],[1,2,3])
means, We need to extract B's 1st 2nd and 3rd row along with B's 1st 2nd and 3rd column.
By this you can get approprite answer.
It can also be written as A=B([1:3],[1:3])
LoL,...............6yrs later
  5 Comments

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