Originally posted by: 88Simon88

Hello everyone, 

I want to write an OPL code to do the piecewise-linear function but I have two parameters. Please, take a look at the following example. I have N different curves and each curve is divided into 30 breakpoints. I appreciate it if could help me in this regard.

int nbp = 30; // Number of Breakpoints
int N = 20;
range cell = 1..N;

float mortality_slope[cell][1..nbp+1] = ...;
dvar int x;

pwlFunction Mortality = piecewise(j in cell,i in 1..nbp) 
{mortality_slope[j][i] -> i; mortality_slope[j][nbp+1]}(0,0); 

maximize Mortality(1,x);
subject to
{
    x == 35;
    true; 
}

Best regards.

Hi

int nbp = 30; // Number of Breakpoints
int N = 20;
range cell = 1..N;

float mortality_slope[i in cell][j in 1..nbp+1] = i+j;
dvar int x;

pwlFunction Mortality[i in cell] = piecewise (j in 1..nbp)
{mortality_slope[i][j] -> j; mortality_slope[i][nbp+1]}(0,0);

 

maximize Mortality[1](x);
subject to
{
    x == 35;
    true;
}

could help ?

regards

PS:

https://www.linkedin.com/pulse/making-decision-optimization-simple-alex-fleischer/

Originally posted by: 88Simon88

Thank you very much. You are perfect.