when i execut i got an error ??? Undefined function or method 'randperm' for input arguments of type 'double'. Error in ==> ant at 26 tour(ic,:)​=randperm(​Ncity);

tour(ic,:)=randperm(Ncity);

Answer 1

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Type

>> which -all randperm

and tell us what it says. Most likely you have some other randperm that has blown away the built-in one (i.e. is being used in precedence to the built in one), or somehow you deleted the built-in randperm.