Asked by PK
on 28 Jun 2013

I have a 50x50 matrix and n that the last row has 0,1,2 at different locations ie., 0 n 10 rows,1 n 20 rows ad 2 in 20 rows, so depending on the column value how can i extract all rows containing 0 at 50th column and save them in to a single variable

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Answer by Image Analyst
on 28 Jun 2013

Accepted answer

Try this:

% Generate sample data A=[... 1 2 3 0; 1 2 5 0; 5 8 6 1; 6 8 7 0; 5 4 7 2; 6 5 8 0] % Get last column lastColumn = A(:, end); % Get zeros A0 = A(lastColumn == 0, :) % Get zeros A1 = A(lastColumn == 1, :) % Get zeros A2 = A(lastColumn == 2, :)

In the command window:

A = 1 2 3 0 1 2 5 0 5 8 6 1 6 8 7 0 5 4 7 2 6 5 8 0 A0 = 1 2 3 0 1 2 5 0 6 8 7 0 6 5 8 0 A1 = 5 8 6 1 A2 = 5 4 7 2

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## 2 Comments

## Sean de Wolski (view profile)

Direct link to this comment:http://www.mathworks.com/matlabcentral/answers/80553#comment_157451

A small example of your matrix and expected results would make this much easier to grasp.

## PK (view profile)

Direct link to this comment:http://www.mathworks.com/matlabcentral/answers/80553#comment_157452

@Sean de Wolski A=[1 2 3 0; 1 2 5 0;5 8 6 1;6 8 7 0;5 4 7 2;6 5 8 0] so in this there are 6 rows and depending on fourth element of the row all the rows containing same number are to be pinned up to a single variable ie.,rows 1,2,4,6 are to be stored to a single variable and row 3 to another and row 5 to another.