Matlab prompts undefined operator ‘*’ for input arguments of type ‘cell’



x={0.5,0.53,0.56,0.6};
N=length(x);
 for m=1:N
    S=2*cos(2*pi*x(m)*u)+S; 
 end 

Tips:

Undefined operator ‘*’ for input arguments of type ‘cell’.

Because x (m) is not a number, but a list, we need to change x to x = [0.5,0.53,0.56,0.6];

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