# Making functions with 'inline' command in matlab

1. Sep 9, 2007

### nottern

hi everybody... i'm new here, and i'm here 'cause i'm having some trouble with matlab
i was trying to integrate a function, so i first defined the function with the inline command:
f=inline('1/sqrt(1-0.25*sin(x)^2)')
now matlab says nothing if you write the function with this command, but it makes it after, when you decide to do some operation... that happens to me when i try to integrate using the quad command, and matlab throws those red letters saying Error...
i may be making some syntaxis mistakes, that's why i'm asking here for some help

by the way, i want to do this integral
$\int_0^{\frac{\pi}{2}} \frac{ds}{\sqrt{1-0.25\sin^2(s)}}$
thanks

Last edited: Sep 9, 2007
2. Sep 17, 2007

### CEL

try
f=inline('1./sqrt(1-0.25*sin(x).^2)')