用执行块填充 excel 中的一个元组

Question

我必须为我的 CPLEX CPL 填写以下元组 model:

tuple Assignment{
       int id; //ID of the Operation O_ij, connects opearation and assignment
       int worker; //worker l for operation O_ij
       int machine; //machine k for operation O_ij
       int time; //processing time of the operation O_ij
     }

现在的问题是元组的每个元素都应该以不同的方式填写，即“id”将来自迭代步骤，对于“worker”我必须从中获取一组整数Excel 中的单个单元格，对于“机器”，我必须检查 Excel 中的单元格是否为空，最后对于“时间”，我必须乘以一些 Excel 单元格。

我最初的想法是在执行块中使用一堆 for 循环来完成它，因为我必须根据迭代移动单元格范围。问题是我不能在我的 .mod 文件中使用 SheetConnection，我也不能在 .data 文件中使用执行块。

有什么方法可以让我从 .mod 文件访问 Excel 或在 .data 文件中使用执行块？

Answer 1

写在https://www.linkedin.com/pulse/javascript-within-opl-cplex-alex-fleischer/

In OPL we can use scripting for preprocessing and postprocessing,for flow control, but also within the data file .dat to process data.

https://github.com/AlexFleischerParis/oplscripting/blob/main/zooscriptingindata.dat

中的示例

prepare {                                      
   function priceDecrease(s, name) {  
      writeln("before price decrease");
      writeln("s=",s);                
      for(i=0;i<s.size;i++) Opl.item(s,i).cost-=100;
      writeln("after price decrease");
      writeln("s=",s); 
      return true;
   }   
}

nbKids= 300;

buses={<40,500>,<30,400>} invoke priceDecrease;

您也可以在不使用 SheetRead 的情况下使用 SheetRead，如 https://github.com/AlexFleischerParis/oplexcel/blob/main/readwithoutsheetread.mod

中所示

// Read from an Excel spreadsheet without SheetRead
// which means you can use this on non Windows platform

execute
    {

    function read_excel(filename,sheetname,skiprows,nrows,cols,datfilename,resname)
    {
        var quote="\"";
        
        var python=new IloOplOutputFile("c:\temp\readexcel.py");
        
        python.writeln("import pandas as pd");
        python.writeln("import xlrd");
        python.writeln("df=pd.read_excel('"+filename+"'"+",sheet_name = '"+sheetname+"'"+
        ",skiprows = "+skiprows+  ",nrows= "+nrows+ ","
        +"header=None,usecols = '"+cols+"')");
        python.writeln("print(df)");
        
        
        
        python.writeln("res = open(",quote,datfilename,quote,",",quote,"w",quote,")");
        python.writeln("res.write(",quote,resname,"=[",quote,")");
        python.writeln("res.write(",quote,"\","n",quote,")");
        python.writeln("for i, row in enumerate(df.values):");
       
        python.writeln("   res.write(",quote,"[",quote,")");
        
        python.writeln("   for j in row:");
       
        python.writeln("      if (j==j):");
        python.writeln("         res.write(str(j))");
        python.writeln("         res.write(\",\")");
       
        python.writeln("   res.write(\"],\")    ");
        python.writeln("   res.write(",quote,"\","n",quote,")");
        python.writeln("res.write(\"];\")");
        python.writeln("res.close()");
        python.close();
       
        python.close();
        
        IloOplExec("C:\Python36\python.exe c:\temp\readexcel.py",true);
        
    }
    read_excel("c:\\temp\\read2Darray.xls","Sheet1",0,2,"B:D","c:\\temp\\resexcel","res");
}

用执行块填充 excel 中的一个元组

Filling a tuple from excel with the execute block

excel

cplex

opl