how to add a row and column to a matrix ?

410 views (last 30 days)
eg.
A = [1 2 3
4 5 6
7 8 9];
and transform it to;
A = [1 2 1 3
4 5 1 6
1 1 1 1
7 8 1 9];

Accepted Answer

Jos (10584)
Jos (10584) on 24 Oct 2019
One easy option is to do this for rows and columns separately
A = [1 2 3 ; 4 5 6 ; 7 8 9]
x = 3 ; % add a row/column of ones before this row/column
A(end+1, :) = 1 % add row add the end
A([x end], :) = A([end x], :) % swap the x-th and last row
% do the same for columns
A(:, end+1) = 1
A(:, [x end]) = A(:, [end x])

More Answers (0)

Categories

Find more on Creating and Concatenating Matrices in Help Center and File Exchange

Products


Release

R2019a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by