Inline Functions

We can also use the inline command to perform the circle calculations.

This can be done directly at the command prompt (or in our current file).

We type

circumference = inline('2*pi*r')

circumference =

     Inline function:
     circumference(r) = 2*pi*r

and

area = inline('pi*r.^2')

area =

     Inline function:
     area(r) = pi*r.^2

Inline functions are evaluated using the feval command.

To get the circumference of a circle with radius 5 we use

feval(circumference,5)

ans =

   31.4159

To get both values we use, e.g.,

circledata = [feval(circumference,5); feval(area,5)]

circledata =

   31.4159
   78.5398

Vectorized usage:

circledata = [feval(circumference,[2 4 6]); feval(area,[2 4 6])]

circledata =

   12.5664   25.1327   37.6991
   12.5664   50.2655  113.0973