My array size is 32 x 240,now i want to pad zeros to make it as 192 x 240.How to do it using matlab code

x = [zeros(floor(ls/2),n) x zeros(ceil(ls/2),n)];

i am getting error as

Error using horzcat
Dimensions of matrices being concatenated are not consistent.

so i checked size of all 3.i.e size of zeros(floor(ls/2),n) is 32 x 240, whereas size of zeros(ceil(ls/2),n) is 32x240. size of x is 192:240.

[kaavya subramani]

size of x is 192 x 240

Answer 1

[Walter Roberson]

x = [zeros(floor(ls/2),n); x; zeros(ceil(ls/2),n)];

[kaavya subramani]

 x = [zeros(m,floor(ls/2)); x; zeros(m,ceil(ls/2))];

this shows error as :

Error using vertcat
Dimensions of matrices being concatenated are not consistent.

help me to solve this sir

[kaavya subramani]

size of both :zeros(m,floor(ls/2)),zeros(m,ceil(ls/2)) is 192 x 8.size of x is 272 x 240.

[Walter Roberson]

ls=64; n = 240; x = ones(192,n);
x2 = [zeros(floor(ls/2),n); x; zeros(ceil(ls/2),n)];

works fine.

Your new code has

x = [zeros(m,floor(ls/2)); x; zeros(m,ceil(ls/2))];

notice that the part before the "x" is m by something, and the part after the "x" is the something by m, which has the dimensions in the opposite order. If that was not a mistake in typing then you need to explain what size you would like the resulting matrix to end up.

[kaavya subramani]

Sir, i downloaded curvelet first generation toolbox and applied a video,in that iso_fuwt2_po function shows error.video dimension is 192x240.so now i changed into 192x192 and applied.i dont know to rectify error so u please help me.

[Walter Roberson]

For simplicity, I suggest that you use zeros() with the size of the desired output matrix, and then you copy the input matrix to the appropriate location in the output matrix. For example:

   strow = 17; stcol = 53;
   outmatrix = zeros(256, 256);
   outmatrix(strow + (1:size(inputmatrix,1) - 1, stcol + (1:size(inputmatrix,2) - 1) = inputmatrix;

This would put inputmatrix into a 256 x 256 matrix with upper left corner) at outputmatrix(17,53)

I have no present information as to the size of matrix required for the toolbox you are using.

[kaavya subramani]

Thanks sir,i try it