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remove rows from a matrix on a specific condition

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Dimitris
Dimitris 2013-2-1
评论： Jona Gladines 2020-10-12
I want to remove rows from a matrix when a specific condition is satisfied.
For example, lets as assume that I have the following 5x5 matrix :
A= [ 5 3 3 1 4
6 6 3 1 0
6 2 2 2 0
4 2 3 2 0
1 1 1 1 2 ]
and I want to delete the rows of this matrix when the elements of the 5th column are equal to 0, so I will be left with the first and last row as an outcome:
A= [ 5 3 3 1 4
1 1 1 1 2 ]
Thanks
  1 个评论
Dimitris
Dimitris 2013-2-1
Just to make clear there are ; for every 5 elements in the example to separate the rows, I hope it is clear, sorry about that

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Daniell Algar
Daniell Algar 2013-2-1
Try
A= [ 5 3 3 1 4; 6 6 3 1 0; 6 2 2 2 0; 4 2 3 2 0; 1 1 1 1 2 ]
A(A(:, 5)== 0, :)= []
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Raghu Vamsi
Raghu Vamsi 2020-1-9
What if the 0 is not exactly in the 5th Column but random in cells, then how to solve the same issue?
Jona Gladines
Jona Gladines 2020-10-12
@Raghu Vamsi, If still needed, repeat for every column. As it wil only remove the rows with a 0 in that specific column.

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