# Copyright 2025, Gurobi Optimization, LLC## This example formulates and solves the following simple SOS model:#  maximize#        2 x + y + z#  subject to#        x1 = 0 or x2 = 0 (SOS1 constraint)#        x1 = 0 or x3 = 0 (SOS1 constraint)#        x1 <= 1, x2 <= 1, x3 <= 2library(gurobi)model<-list()model$A<-matrix(c(0,0,0),nrow=1,byrow=T)model$obj<-c(2,1,1)model$modelsense<-'max'model$ub<-c(1,1,2)model$rhs<-c(0)model$sense<-c('=')# First SOS: x1 = 0 or x2 = 0sos1<-list()sos1$type<-1sos1$index<-c(1,2)sos1$weight<-c(1,2)# Second SOS: x1 = 0 or x3 = 0sos2<-list()sos2$type<-1sos2$index<-c(1,3)sos2$weight<-c(1,2)model$sos<-list(sos1,sos2)result<-gurobi(model)print(result$objval)print(result$x)# Clear spacerm(model,result)