when I have running the below code I have got error message

when I have running the below code I got the following message

*??? Error using ==> randperm
Too many input arguments.*

The code is

locations_per_FACT = 4;
number_of_types = 4;
number_of_locations = 13;
population_size = 100;
for K = population_size : -1 : 1
  FACT(K) = struct('location', randperm(number_of_locations,locations_per_FACT), 'type', randi(number_of_types,1,locations_per_FACT), 'rate', rand(1,locations_per_FACT));
end

[Geoff Hayes]

omer - this error message is telling you that are trying to pass too many input arguments into the http://www.mathworks.com/help/matlab/ref/randperm.html function. I can run the above code without any problems (using R2014a) so perhaps your version of MATLAB doesn't support the two arguments. In the Command Window, type

 help randperm

What does the help show you? Does it show that you can pass one or two arguments? My help shows

   randperm Random permutation.
      P = randperm(N) returns a vector containing a random permutation of the
      integers 1:N.  For example, randperm(6) might be [2 4 5 6 1 3].
      P = randperm(N,K) returns a row vector containing K unique integers
      selected randomly from 1:N.  For example, randperm(6,3) might be [4 2 5].
      etc.

Answer 1

[Walter Roberson]

Sufficiently old versions of randperm did not support two arguments. The replacement for

   C = randperm(A,B)

in that case is

T = randperm(A);
C = T(1:B);

[omer Elsiddig]

Dear Mr. Walter

Accordingly you may modify the below code:

locations_per_FACT = 4; number_of_types = 4; number_of_locations = 13; population_size = 100; for K = population_size : -1 : 1 FACT(K) = struct('location', randperm(number_of_locations,locations_per_FACT), 'type', randi(number_of_types,1,locations_per_FACT), 'rate', rand(1,locations_per_FACT)); end

[Walter Roberson]

Accordingly you can learn enough matlab to modify it yourself. I have shown you the pattern and you have seen enough matlab code that the basics are not a mystery to you.

We are not here to do everything for you. We teach you and you use the information to do the work yourself.

[omer Elsiddig]

Thank you Walter