library(MCDA)
performanceTable <- matrix(runif(3*4), ncol=3)
row.names(performanceTable) <- c("x1","x2","x3","x4")
colnames(performanceTable) <- c("g1","g2","g3")
weights <- c(1,2,3)
names(weights) <- c("g1","g2","g3")
overall1 <- weightedSum(performanceTable, weights)
overall2 <- weightedSum(performanceTable, weights, alternativesIDs <- c("x2","x3"), criteriaIDs <- c("g2","g3"))
stopifnot(length(overall2) == 2)
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