remove rows from a matrix on a specific condition
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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
采纳的回答
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, :)= []
3 个评论
Constantin
2015-4-5
I have tried to do this for the table variable type, but I get the following error message:
Undefined operator '~=' for input arguments of type 'table'
It seems that logical indexing doesn't work in the same way for table variables. What would be an equivalent procedure?
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
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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