Syntax Error: Unknown Function

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MiauMiau 2013-5-29

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https://ww2.mathworks.cn/matlabcentral/answers/77312-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

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采纳的回答

Azzi Abdelmalek 2013-5-29

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https://ww2.mathworks.cn/matlabcentral/answers/77312-syntax-error-unknown-function#answer_86958

You can tell us what is the value of gam?

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MiauMiau 2013-5-29

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

MiauMiau 2013-5-29

works, thanks!

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Muruganandham Subramanian 2013-5-29

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https://ww2.mathworks.cn/matlabcentral/answers/77312-syntax-error-unknown-function#answer_86959

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

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Muruganandham Subramanian 2013-5-29

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

MiauMiau 2013-5-29

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?

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