GA IN EXCEL SOLVER EXAMPLES HOW TO

The GDXXRW reads data from the range A1:D3 in results.xlsx into a GAMS parameter called Level in the GDX file results.gdx. The command $call above executes a program called GDXXRW during compile time. The data in the Excel file can be loaded into a GDX file using the $call command and GDXXRW tool: $call gdxxrw.exe results.xlsx par=Level rng=A1:D3 *= Fix variables to values from Excel file $call gdxxrw.exe results.xlsx par=Level rng=sheet1!A1:D3 *= First unload to GDX file (occurs during compilation phase) It is also possible to convert data stored in a GDX file into an Excel file spreadsheets using GDX2XLS tool and to write GAMS data to standard output formatted as a GAMS program with data statements using GDXDUMP tool.Ĭonsider the following modifciation of the model from the gams model library and the file results.xlsx file created from the previous example. Note that GAMS can also write data into a GDX file during compile time. For the second call for marginals x.M, data will be written to cells F1:I4 in the sheet named NewSheet. The solution x and the marginals of x in the GDX file can be written to the Excel file results.xlsx using GDXXRW tool: execute 'gdxxrw.exe results.gdx var=x.L'Įxecute 'gdxxrw.exe results.gdx var=x.M rng=NewSheet!f1:i4'įor the first call for x.L, there is no range specified and the data is written in cell A1 and beyond in the first available sheet. The execute_unload command above is executed during the actual execution phase to create a GDX file called results.gdx. *= Write marginals to a different sheet with a specific rangeĮxecute 'gdxxrw.exe results.gdx o=results.xlsx var=x.M rng=NewSheet!f1:i4'Īfter the solve statement, the data ( x.L and x.M) from variable x can be written into a GDX file during the execution time using the command execute_unload: execute_unload 'results.gdx' x.L x.M *= Since we do not specify a sheet, data is placed in first sheetĮxecute 'gdxxrw.exe results.gdx o=results.xlsx var=x.L' *= Now write to variable levels to Excel file from GDX *= First unload to GDX file (occurs during execution phase) Supply(i) 'observe supply limit at plant i'Ĭost. Z 'total transportation costs in thousands of dollars' Parameter c(i,j) 'transport cost in thousands of dollars per case' Scalar f 'freight in dollars per case per thousand miles' /90/ Table d(i,j) 'distance in thousands of miles' J 'markets' / new-york, chicago, topeka /

I 'canning plants' / seattle, san-diego / The data exchange between GAMS and a CSV (Comma-separated values) file format and GAMS is covered in Data Exchange with Text Files.Ĭonsider the following modication of the model from the gams model library. Some of GAMS/Excel data exchange tools that provide functionality to exchange data between GAMS and Excel are also discussed in the section Data Exchange Tools. Similarly selected Excel data can be written to a GDX file and then read into GAMS: Excel -> GDX -> GAMS. In order to write data from GAMS and to Excel, selected GAMS data can be written into a GDX file and then to an Excel file: GAMS -> GDX -> Excel. GAMS can communicate with Microsoft Excel via GDX (GAMS Data Exchange) files.

GA IN EXCEL SOLVER EXAMPLES HOW TO

This tutorial gives an overview on how to exchange data between GAMS and Microsoft Excel.

Ga in excel solver examples