How do I add a column to a matrix?

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.

Answer 1

[TAB]

Arr = rand(30,30);

%Delete first column
Arr(:,1) = [];

NewCol = rand(30,1);

%Add new column
Arr = [Arr NewCol];

[raj]

I am new on working with matrices can u tell me if i can convert an array to matrix of desired size i.e..,(rowsxcolumns)

[Image Analyst]

Depending on *how* you want to do it, you could use interp2, imresize, padarray, etc.

[TAB]

Also see reshape

Answer 2

[Walter Roberson]

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;