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| RE: lpSolve - Load data into matrix [ Reply ] By: Arne Henningsen on 2014-09-13 04:51 | [forum:41444] |
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Dear Mauro Here is a simplified example that you can adjust to create the column names for your matrix:: paste( "S(", rep( LETTERS[1:4], each = 3 ), rep( LETTERS[24:26], 4 ), ")") Please note that this forum is for the R-package "linprog" and not for the R-package "lpSolve". Best regards, Arne |
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| lpSolve - Load data into matrix [ Reply ] By: Mauro Rozenberg on 2014-09-11 13:08 | [forum:41442] VACAC_lpSolve.r (13) downloads
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Hi all! I'm new using R and lpSolve but I do have experience using other analytics and optimization software. I think I'm doing fine but I have come up with a little problem. My program optimizes the scheduling for different stores. It has variable size (variables and constrains) depending on the data that is read from a data base. The difficulty that I met is that I can't find a way to name the variables and load the data into the LP model matrix without using a for loop which is not very . Here's what I’m doing for the naming. Could you suggest me something better? for (X in 1:QBlo) { for (Y in 1:QSem) { C <- C + 1 colnames(lpmodel)[C] <- paste("Salida(Leg:", unique(RR_bloque$LEG)[X], "_Bloq:", RR_bloque$SEM[X], "_Sem:", Suc_sem$SEM[Y], ")" , sep="") set.type(lpmodel,C,"binary") } } Attached is the complete programm. Best, MR |
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