MATLAB: Do I get the error Array indices must be positive integers or logical values when using the sin function

Question

I tried to use this code right out of the help:

>> x=-pi:0.01:pi;

>> plot(x,sin(x)), grid on

But I get the error "Array indices must be positive integers or logical values."

I also tried:

>> z=pi/2

z =

1.5708

>> y=sin(z)

Array indices must be positive integers or logical values.

Answer 1

You named a variable sin.

Clear your workspace of this variable, e.g.: restart MATLAB, or run this command:

clear sin