I have defined a function in matlab:
function1 = @(x,y,z)[x*y*z,y^2,x+z]
Then in the program I want to writ, I want to evaluate the values of this function for (1,2,3).
Outside the program I can use feval(function1,1,2,3) and this returns
6 4 4.
Now inside my program, I want the input to be like this: output = program(fun, vec), where vec is a vector like [1,2,3].
If I now call: feval(fun,vec) I get the following error message:
Error using @(x,y,z)[x*y*z,y^2,x+z]
Not enough input arguments.
Can someone tell me how I can evaluate the values of my function when the input is a vector instead of three seperate numbers?
Many thanks!
You need a comma-separated list. Define your vector vec as follows:
vec = {1 2 3}
or use
vec = [1 2 3]
vec = num2cell{vec}
and then call feval:
feval(fun,vec{:})
It is actually obsolete to evaluate functions with feval, the following is equivalent:
function1(1,2,3)
function1(vec{:})
As you want to pass the vector vec to your program you need to modify your program to either accepted a various number of inputs with varargin:
program(fun, vec{:))
or you change the evaluation of vec inside your function to vec{:}