Defining poisson distribution in GAMS

Question

I have this OR model in GAMS and i need to define a parameters which has poisson distribution, my code is:

Scalar Landa 'mean for poisson distribution' /3/;
Parameter L;
L=Poisson;

I get the error $140 which means unknown symbol Does anybody know how to fix this?

score 1 · Accepted Answer · answered Jun 01 '15 at 20:09

1

You can define those variables in the emp.info file.

Add the following to you your GAMS code:

Scalar Landa 'mean for poisson distribution' /3/;
file emp / '%emp.info%' /; put emp '* problem %gams.i%'/;
$onput
randvar L poisson Landa
$offput

answered Jun 01 '15 at 20:09

David Prentiss

Sorry to bother you again, I'm trying to use the random variable L in the rest of my code but i get the unknown symbol error for it. – Sepideh Gh Jun 18 '15 at 06:46
BTW, you still need `paramenter L;` Do you have minimal example code for the error? – David Prentiss Jun 18 '15 at 12:01

score 0 · Answer 2 · answered Jun 16 '16 at 14:04

0

try this:

Scalar Landa 'mean for poisson distribution' /3/;
Parameter L;
L=E=Poisson;

Hope it helps!

answered Jun 16 '16 at 14:04

Manuelpalcaraz

2 Answers2