GAMS World Forum

Thanks Renger! i will call R as you suggest

Hello! Is there a way to read data from a .txt file, without having to transform such file into GAMS sintaxis? For example, I want to read this instance of a scheduling problem *********************** 120 300 11 20 18 4 15 200 1000 2000 83 2 5 16 11 8 7 34 5 11 200 1000 2000 37 2 5 10 7 5 4 17 6 11 ...

Dear all: I want to graphically represent a solution to a model, which can be done by means of rectangles. I have tried to find information about this, but what I found did not really help me. Even I found a related topic in this forum, but apparently it was too old and I could not access it. Any hi...

Thanks! I guess then that the second code I put

set j jobs /0*4/;
set i machine /1*2/;

is correct because the unique element list is 0,1,2,3,4.

I really appreciate the explanation

Hello! I found this week an error which I had never found before ... When running these lines *************** set i machine /1*2/; set j jobs /0*4/; parameter oo(j); oo(j) = ord(j); display oo; *************** I get an error. However, if I swap the first two, there is no error: ***************** set...

Thanks Michael, I'll have a careful look at Erwin's B&B code, which surely will help me build my Branch-and-Check

Hello everyone!

I would like to code a Branch-and-Check algorithm in GAMS. Do you have an example you could share with me? This would be of great help

Thanks!

Fede

Thanks Renger. I'll try that or, the easier brute force: define one scalar for each index value

Hello, I am trying to print in an excel sheet the values of a certain parameter, but I don't want for the domain set to be printed as well. For example, if I run: execute_unload 'results.gdx' x_model $onecho > gdxxrw_args_100.txt par=x_model rng=RCG_results!a1 $offecho execute 'gdxxrw.exe results.gd...