I am using older version of GAUSS 6. How do I fixed the random sample for each replication in rndu generator? I use:
replication=1000;
rndseed=688671; then X=rndus(2,3,seed);
end of replication.
However, for each replication loop, X is different. I expect they should be exactly the same. Am I using the correct way of fixing the sample each time?
1 Answer
0
No, that is not correct. rndseed is used to set the internal seed which is used by random number generators which do not take a seed as an input. It is not set with an equals sign. Here is a simple example:
// Each iteration will print the same random numbers
for i(1, 2, 1);
// No equals sign with 'rndseed'
rndseed 777;
print rndu(3, 1);
endfor;If you are going to use a random number generator which accepts a seed as input, then you set this variable, not rndseed, like this:
// Each iteration will print the same random numbers
for i(1, 2, 1);
seed = 777;
print rndus(3, 1, seed);
endfor;All of those will work for older or modern versions of GAUSS. This below will also work since about GAUSS 12:
// Each iteration will print the same random numbers
for i(1, 2, 1);
seed = 777;
{ X, seed} = rndu(3, 1, seed);
print X;
endfor;
Your Answer
1 Answer
No, that is not correct. rndseed is used to set the internal seed which is used by random number generators which do not take a seed as an input. It is not set with an equals sign. Here is a simple example:
// Each iteration will print the same random numbers
for i(1, 2, 1);
// No equals sign with 'rndseed'
rndseed 777;
print rndu(3, 1);
endfor;If you are going to use a random number generator which accepts a seed as input, then you set this variable, not rndseed, like this:
// Each iteration will print the same random numbers
for i(1, 2, 1);
seed = 777;
print rndus(3, 1, seed);
endfor;All of those will work for older or modern versions of GAUSS. This below will also work since about GAUSS 12:
// Each iteration will print the same random numbers
for i(1, 2, 1);
seed = 777;
{ X, seed} = rndu(3, 1, seed);
print X;
endfor;