how to find the mean of a function that I have got the outputs for, I have made my function but I need to find the mean of it and I can't work out how to do this, thanks

My function is for producting a 1 or 0 depending on if t>k where t and k are random numbers, ive made my function and it works and it produces a 500x1 array as an outcome how do i find the mean of this?

Answer 1

[Walter Roberson]

out = YourFunction();
mean(out)

[leanne brown]

whenever i try this is get 'Output argument "f" (and maybe others) not assigned during call to "f".'

[leanne brown]

function f = f(t)
N=17;
 j = 1:N
 t = 0+10*rand(1,N)
 k = 0+10*rand(1,N)
 t<k
end

this is my function if that helps

[Walter Roberson]

function f = f(t)

Using an output variable name that is the same as the function name is confusing at best, and potentially wrong.

N=17;
 j = 1:N
 t = 0+10*rand(1,N)
 k = 0+10*rand(1,N)
 t<k

You compute t<k and you let it display to the screen, but you do not return it from the function.

In MATLAB, the return value from a function is not the value of the last statement in the function. You need to assign to the output variable.

function out = f();
  N = 17;
  t = 0+10*rand(1,N);
  k = 0+10*rand(1,N);
  out = t<k;
end

or more simply,

    function out = f()
    N = 17;
    out = 10*rand(1,N) < 10*rand(1,N);
    end

which would be the same as

    function out = f()
    N = 17;
    out = rand(1,N) < rand(1,N);
    end

[leanne brown]

this worked, thank you so much :)