Hi,

I know the verbs , ,. ,: to add rows, columns and dimensions to matrices. It is easy to add these to begin or the end of the corrosponding dimension, but what is to do, if I want to add one row/column in the middle of a matrix? Is the only way to slice the matrix in two pieces and join them with the new row/column?

A few examples:

Initial situation:

3 3 $ 0
0 0 0

0 0 0

0 0 0


add column somewhere to the middle:

0 0 1 0

0 0 1 0

0 0 1 0



add row somewhere to the middle:

0 0 1 0

0 0 1 0

1 1 1 1

0 0 1 0


remove the added column:

0 0 0

0 0 0

1 1 1

0 0 0



and the row:



0 0 0

0 0 0

0 0 0



Can anyone help me with this?



Regards

Sebastian
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