MATLAB: Matrix dimensions must agree

dimensionsmatrix

x=linspace(-2*pi,2*pi,50)

y=(1/x)

why i get matrix dimensions must agree

Best Answer

You need to use element-wise operator

y=(1./x)
   %^ put a dot here

Read about element-wise operators here: https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

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MATLAB: Matrix dimensions must agree

Ismail - using the .* implies that you want to do element-wise multiplication i.e. multiply each element of one matrix with the corresponding (same row and column) element of the other matrix. Since your matrices are of different dimensions then the error makes sense. Just change this line to

 result = dft * H_blurring;

and you will now be doing the usual matrix multiplication.

MATLAB: Matrix dimensions must agree.

Yes, they must.

However you can get round that restriction by using the meshgrid function:

n = 0:1:10;
t = 0:0.01:10;
[N,T] = meshgrid(n,t);
Vt = @(n,t) (3./(n.*pi)).*(2-cos(-(pi.*n))-cos(pi.*n)).*sin(pi.*n.*t);
plot (t, Vt(N,T))
grid on

Experiment to get the result you want.

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MATLAB: Matrix dimensions must agree

MATLAB: Matrix dimensions must agree.

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