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Addressing bug #4 #5

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Addressing bug #4 #5

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4 changes: 2 additions & 2 deletions pkg/R/unimodularity.R
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Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,7 @@ is_totally_unimodular <- function(A) {

# A matrix with elements not in {-1,0,1} cannot be totally unimodular.
if ( !all(A %in% c(-1,0,1)) ){
value <- FALSE
return(FALSE)
}

# After reduction, A has no rows or columns containing less than 2 elements.
Expand Down Expand Up @@ -116,7 +116,7 @@ hellerTompkins <- function(A){
for ( i in 1:ncol(I)){
M1 <- A[I[ , i], ,drop=FALSE]
M2 <- A[-I[ , i], ,drop=FALSE]
if ( !any(abs(colSums(M1)) == 2) && !any(abs(colSums(M2)) == 2) ){
if ( !any(abs(rowSums(M1)) == 2) && !any(abs(rowSums(M2)) == 2) ){
return(TRUE)
}
}
Expand Down