MATLAB: Error using * Inner matrix dimensions must agree

error using *

y=cos(x).*[0.5+(3*sin(x))./(1+x*x)]
Error using  * 
Inner matrix dimensions must agree.
I want to know where is the problem could anyone help me thx

Best Answer

In the last part of the relation you are trying to do x*x, which is not possible. You should either use a dot operator or you need to transpose one of the x.
x=1:10;
y1=cos(x).*[0.5+(3*sin(x))./(1+x.*x)] 
y2=cos(x).*[0.5+(3*sin(x))./(1+x*x')]
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