How do I add a column to a matrix?
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I created a 30x30 matrix and now I want to delete the 1st column of data and add another column replacing the deleted column (which should not replace the same column), so I again get a matrix of size 30x30. I am successful in deleting the 1st column but cannot add another column.
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Accepted Answer
TAB
on 23 Jan 2012
Arr = rand(30,30);
%Delete first column
Arr(:,1) = [];
NewCol = rand(30,1);
%Add new column
Arr = [Arr NewCol];
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Image Analyst
on 23 Jan 2012
Depending on *how* you want to do it, you could use interp2, imresize, padarray, etc.
More Answers (1)
Walter Roberson
on 23 Jan 2012
If you know you are going to delete and add a new column in the same place, then just assign the new data overtop of the old data:
Arr(:,1) = NewData;
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