why i get error?

Question

razzz 2013-12-31

编辑： Wayne King 2013-12-31

i=i

MO=1;

fi=-pi:pi/100:pi;

y=(MO*(exp(fi*i))*(2*exp(fi*i)+1))/(EI*(8*exp(fi*i)+2*exp(2*fi*i)+2))

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i got:

??? Error using ==> mtimes Inner matrix dimensions must agree.

Error in ==> rrrr at 10 y=(MO*(exp(fi*i))*(2*exp(fi*i)+1))/(EI*(8*exp(fi*i)+2*exp(2*fi*i)+2))

Answer 1

Wayne King 2013-12-31

编辑：Wayne King 2013-12-31

It would help if you told us what EI is. I just made it equal to 1 here. Is this what you are looking for?

And why do i=i????

 MO=1;
 fi=-pi:pi/100:pi;
 EI = 1;
 y=(MO*(exp(fi*1i)).*(2*exp(fi*1i)+1))./(EI*(8*exp(fi*1i)+2*exp(2*fi*1i)+2));