Why am I getting "Array indices must be positive integers or logical values"?

I'm currently trying to plot a function from x=0 to 1 and the function "var" keeps coming up with the error code "Array indices must be positive integers or logical values". Any suggestions? Thank you

a=1;
n=1;
x=0:0.01:1;
psi=(2/a).^0.5.*sin((n*pi*x)/a);
N=(10.816).^0.5;
var=N(x.^(0.862)-x.^(2.862));

Answer 1

[Adam Danz]

This line below implies that you're trying to index values from an array N where the index values must be positive integers or logicals.

N(x.^(0.862)-x.^(2.862))

Clearly the "indices" do not meet those requirements.

My guess is that the intention is to multiply N by those values.

var = N .* (x.^(0.862)-x.^(2.862));
%       ^^