Re: [AMPL 6676] Writing to a text file

[victor.z...@gmail.com]

Use print instead:

  print Np > out file.txt;

HTH,

Victor

On Sun, Feb 24, 2013 at 12:22 PM, Parul Pandey <parul.p...@gmail.com> wrote:

Hi Everyone

I want to write my intermediate results to a text file and these results are to be read again by Ampl to solve my optimization problem. When I use display 

" display Np > out file.txt "  

the results are written to the file but they are of the form " Np =2" hence later when I try to read from the same file, I get the error 

"read" command error: expected a number

Could you please help me with the problem. I have looked extensively and used write command too but not able to solve this problem.

Thanks

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[sverkunoff]

you can also append your text file, format the file so that it's later convenient to read, and even make file name a parameter, for example:

print {s in 2..T, d in D, i in I}: {i_ in I} ac[s,d,i,i_]   >> (OutputFile);

prior to which you need something like 

param OutputFile symbolic := "output.out";

see more in section 12.4 of ampl book and in the appendix