Incorrect dimensions for matrix multiplication.

Z=[cos(x)*cos(sqrt(X.^2 + Y.^2))]*e.^-mod(2*x) ;

Error using *

Incorrect dimensions for matrix multiplication. Check that the number of columns in the first matrix matches the number of rows in the second matrix. To perform elementwise multiplication, use '.*'.

Error in main (line 9)

Z=[cos(x)*cos(sqrt(X.^2 + Y.^2))]*e.^-mod(2*x) ;

Answer 1

[Aashray]

The error indicates that the dimensions of the matrices are not consistent with respect to matrix multiplication. For more information regarding the “dimension of matrix,” refer to the MATLAB documentation:

https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

Assuming that “X” and “Y” are matrices of size “m x n”, then the size of the matrix “x” must be “n x m” in order to satisfy compatibility.

X = zeros([m,n]); 
Y = ones([m,n]); 
x = ones([n,m]); 
e = exp(1); 

Z = [cos(x)*cos(sqrt(X.^2 + Y.^2))]*e.^-abs(2*x);