How to copy specific number of columns from a matrix to another matrix?

copy_columns

asked 2016-04-28 08:23:43 -0600

I know the way to copy specific rows from one matrix to another but how can I copy only a specific number of columns from one matrix to another? For example, if we have 10x10 matrix A (10 rows and 10 columns)and I want to copy only the columns ranging from 1 to 5 to another matrix B. Is it possible?

Note: I can't delete the columns from matrix A first.

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answered 2016-04-29 05:40:52 -0600

Ayesha Siddique

111 ●1 ●13 https://pk.linkedin.co...

updated 2016-06-10 02:52:24 -0600

This can be done by defining first the size of matrix B as the number of columns that you want after deletion and same number of rows as in matrix A.

The command is A.col(a).copyTo(B.col(b)) and you must run a loop over command according to your copying pattern between two matrices.

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answered 2016-04-28 08:42:40 -0600

kbarni

4134 ●1 ●13 ●49

Mat B=Mat(A,Rect(0,1,A.rows,5));
Mat C;
B.copyTo(C);

B will be a part of matrix A (if you change A, B will change, too). C is a copy of B (so they are independent).

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i think Mat B=Mat(A,Rect(0,0,A.rows,5));

sturkmen ( 2016-04-28 09:04:15 -0600 )edit

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Asked: 2016-04-28 08:23:43 -0600

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Last updated: Jun 10 '16

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How to copy specific number of columns from a matrix to another matrix? edit

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How to copy specific number of columns from a matrix to another matrix?