AMPL的Extractin LP模型
[英]Extractin LP model from AMPL
问题描述
I have a very big and complicated LP model in AMPL . 
我在AMPL中有一个非常大而复杂的LP模型。 I need to extract Ax<= b format from my LP (ie), I need to extract all my data in form of matrix A , b , and all variables to be concatenate into a large vector x . 我需要从LP中提取Ax<= b格式（即），我需要以矩阵A ， b形式提取所有数据，并将所有变量连接成一个大向量x 。
How can I do that? 我怎样才能做到这一点？
1 个解决方案
解决方案1
0 2018-11-29 12:44:45
In case you are familiar with coding for example in Java you could use an open source library/solver called GLPK. 如果您熟悉例如Java编码，则可以使用一个名为GLPK的开源库/求解器。
In there you can read your .mod file and extract your data from the A and b Matrix. 您可以在其中读取.mod文件，并从A和b矩阵中提取数据。 I am sure that the commercial software such as CPLEX/ Gurobi can also do that (also academic license available). 我确信CPLEX / Gurobi等商业软件也可以做到这一点（也提供学术许可）。 Here you can find the user guide for GLPK: http://www.chiark.greenend.org.uk/doc/glpk-doc/glpk.pdf 您可以在此处找到GLPK的用户指南： http : //www.chiark.greenend.org.uk/doc/glpk-doc/glpk.pdf
Look for the following: 查找以下内容：
- glp get mat row — retrieve row of the constraint matrix glp get mat row —检索约束矩阵的行
perhaps this could help. 也许这会有所帮助。
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.