using_functions.md

Assume you need to write a function that outputs the reciprocal of the square root of the magnitude of a given number and use it in MATLAB. This is how you'll go about it.

STEP 1:

Create a new .m file and name it as (say) sqrtrec.m In this newly created file, start as ~

function y = sqrtrec(x)
  y = 1/sqrt(abs(x));
end

STEP 2:

Now, call this file in your command line, or in any other script that your writing in the same directory.

Eg.

>> sqrtrec(-25)

ans =

    0.2000