selective remove lines from array

hi !! some function for this small problem thank you

Answer 1

[Geoff Hayes]

Firas - if you have a matrix like the following:

Z =

     1     6    11    16    21
     2     7    12    17    22
     3     8    13    18    23
     4     9    14    19    24
     5    10    15    20    25

You can remove the 3rd column (say) by simply typing:

% the colon indicates all row elements in the third column should be
% set to the empty matrix (which removes that column)
Z(:,3) = []

Z =

     1     6    16    21
     2     7    17    22
     3     8    18    23
     4     9    19    24
     5    10    20    25

To remove the 4th row, you do something similar:

Z(4,:) = []

Z =

     1     6    16    21
     2     7    17    22
     3     8    18    23
     5    10    20    25

The above is just one way to remove a row or column (line) from a matrix (array).