Power function in OPL script

Question

I'm trying to initialize a matrix in an OPL script (an execute{}block) Each element must be set to a float power (> 0)

The pow function is not recognized in script, so I tried the ^ operator... but it is not what I expected : the reference says "^ means power in OPL and bitwise xor in Script"

So for now I just used a for() loop, which works but does not accept floating powers :

var temp;
for (var p = 1; p<=nbP; p++){
   for (var n = 1; n <= nbC; n++){
       temp = w[n][p] / i[p];
       MATRIX[n][p] = 1;
       for (var i = 1; i <= desiredPower; i++){
          MATRIX[n][p] = tempNGSI * MATRIX[n][p];
       }   
   }           
}

Is there an equivalent for pow() in OPL script? How can I do otherwise? Note that for() blocks are not recognized outside of the script blocks (execute{})

Why are you using for loops to initialize the matrix? The OPL language itself has declarative ways to initialize matrices. — David Nehme, Jul 17 '14 at 16:26
@DavidNehme I wanted to make this calculation inside the OPL .mod so my data files needs no change, that's why... I guess I will have to make a specific input file for this one — Aname, Jul 17 '14 at 16:30

score 2 · Accepted Answer · answered Jul 17 '14 at 16:31

2

OPL script (like it's cousin javascript) has the basic mathematical functions wrapped up in the Math object.

for (var p = 1; p<=nbP; p++){
   for (var n = 1; n <= nbC; n++){
       MATRIX[n][p] = Math.pow(w[n][p] / i[p], desiredPower);
   }           
}

answered Jul 17 '14 at 16:31

David Nehme

21,379
8
78
117

1

So much time lost for a math object... At least I won't forget it, Thank you! – Aname Jul 17 '14 at 16:38

Power function in OPL script

1 Answers1