Syntax Error: Unknown Function

Hi, for the following code:

n = 50000;
g = 0.3;

x = [];

for i=1:n
    k = 0;
    while unifrnd(0,1) < g        
        k = k + 1;       
    end

      b = 0; 
      mynumber = 2;
      for j = 1:k

          switch mynumber

          case 1
          v = random(beta,3,3)
          case 2
          v = random(gam,5,5)
          case 3
          v = random(exp,3)
          case 4
          v = random(geo,0.2)
          case 5
          v = random(unif,0,5)
          case 6
          v = random(norm,0,1)
          end

        b = b + v;

      end

      if b ~= 0
          x = [x, b];
      end
  end

I get the following error: Undefined function or variable 'gam'.

Error in test (line 21) v = random(gam,5,5)

why is that? Thanks

Answer 1

[Azzi Abdelmalek]

You can tell us what is the value of gam?

[MiauMiau]

gam(5,5) should be a gamma random variable with shape and scale parameters equal to 5. So I always add one sort of random variable to b.

[Azzi Abdelmalek]

Maybe you should use 'gam' instead of gam

[Azzi Abdelmalek]

You can't use

v = random(beta,3,3)  % you missed ' '

it should be

v = random('beta',3,3)

The same remark for the other options gam, geo,norm,...

[MiauMiau]

ah..so that's it. I will try it

[MiauMiau]

works, thanks!

Answer 2

[Muruganandham Subramanian]

Refer this link: http://www.mathworks.in/support/solutions/en/data/1-FA99UB/index.html?solution=1-FA99UB

[MiauMiau]

The path is set, so it is not a problem with the path but it must be some syntax error

[Muruganandham Subramanian]

see, You hav to declare the variable 'gam' and others as global or local, then only you can call it..

[MiauMiau]

But "gam" is just an already defined distribution in matlab...as "normrnd(.." since when has this decleration to be done? And where do I have to do it?