MATLAB: Inserting a row and moving other rows down

helpMATLABmatrix

I am trying to insert a row of ones as the new 2nd row to my matrix, but i want ot move the other rows down. My matrix is defined as A =

3 7 6 0

8 2 5 0

0 1 9 0

Best Answer

A = [A(1,:);[1,1,1,1];A(2,:);A(3,:)]

Related Solutions

MATLAB: How tonsert Column and Row in all dimensions of a matrix

[rows, cols] = size(A);
B = [ones(1, cols+2); ones(rows, 1), A, ones(rows, 1); ones(1,cols+2)]

Alternately if you have the Image Processing Toolbox,

B = padarray(A,[1,1],1);

MATLAB: How to add a row and column to a matrix

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])

Best Answer

Related Solutions

MATLAB: How tonsert Column and Row in all dimensions of a matrix

MATLAB: How to add a row and column to a matrix

Related Question