How to define a function

Hey guys. I am having a problem now and I really need help. I have to define a function which calculates the distance of a certain point from the center of the circle to determine is the point is in/on/outside of the circle. Suppose the radius is r, the center is (a,b). How can I use "If" and "return" to construct the problem? Thank you so much

Answer 1

[Joseph Cheng]

check the documentation on functions http://www.mathworks.com/help/matlab/ref/function.html. after that it'll look something along the lines of

 function output = yourfunction(a,b,r,x,y)
   %calculate distance from (x,y) and (a,b)
   %if statements to check if 
   %distance is == r 
   %elseif distance is <r
   %elseif distance is >r
   %return

I do not understand why you'd need a return statement