real part of a complex number

Hi,

I am trying to get the real part of a complex number and my matlab gives error.

for example: I write:

Z = 2+3*i;
X = real(Z) code

and I get:

Index exceeds matrix dimensions.

Any idea why?

Answer 1

[Stephen23]

Because you have assigned the name real to a variable. When you shadow an inbuilt function or variable with your own variable, then that inbuilt function cannot be called.

Solution: clear that variable:

 clear real

And do not use variable names length, size, cell, i, j, real, etc.