Changing output names within a loop

Hello,

I have a loop on which I want to save different outputs for each loop value, I was trying the following syntax but it is not working, and I couldn't find in the Manuals an answer, how could I do it?

for W_Cons (1,6,1);
output file = "New_Code_80_FF_7_b_VFSS3_outerDIFF_GAMMA"$+ntos(W_Cons)".out" reset;

endfor;

best,

Mauricio.

3 Answers



0



To do this you need to:

  1. Create a string with the name of the file.
  2. Use this string and the caret operator (^) to specify the file name like this:
for W_Cons (1,6,1);
    fname = "New_Code_80_FF_7_b_VFSS3_outerDIFF_GAMMA"$+ntos(W_Cons)$+".out";
    output file = ^fname reset;
endfor;

aptech

1,488


0



Thank you, it worked. c\Could you briefly explain to me why is that?



0



The filename parameter of the output keyword is specified to take "a literal or a ^string".

Literals

Most GAUSS functions take variables. For example,

// Create a string variable
s = "Hello there!";

// Print the contents of 's'
print s;

In this case, print acts on the contents of the variable s. It does not print the letter s.

With a literal, the text does not represent another value like a variable does.

// Send output to a file named my_results.txt
output file = my_results.txt reset;

In the example above, my_results.txt is not a variable that represents a different value. It is the literal file name we want to use.

^strings

Literals work just fine unless you need to change its value during the run of your program. So we need a way to tell GAUSS, this filename is a string, don't use its literal value. That is what the caret (^) operator does with a string.

// Create string variable
filename = "my_results.txt";

// Tell the output command that filename
// is a string variable, not a literal
output file = ^filename reset;

Other commands which use literal and ^string

  • chdir
  • create
  • msym
  • open
  • save
  • saveall
  • shell

aptech

1,488

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