createBoundBox | R Documentation |
Calculate a bounding box around a polytope given by a set of linear constraints.
createBoundBox(constr, homogeneous=FALSE)
constr |
Constraint definition |
homogeneous |
Whether constr is given in homogeneous coordinate representation |
See har
for a description of the constraint definition and the homogeneous coordinate representation.
This function uses findExtremePoints
to find extreme points along each dimension.
lb |
Lower bound for each dimension (not including homogeneous coordinate). |
ub |
Upper bound for each dimension (not including homogeneous coordinate). |
Gert van Valkenhoef
har
findExtremePoints
# constraints: x_1 >= 0, x_2 >= 0, x_1 + x_2 <= 1 A <- rbind(c(-1, 0), c(0, -1), c(1, 1)) b <- c(0, 0, 1) d <- c("<=", "<=", "<=") constr <- list(constr=A, rhs=b, dir=d) bb <- createBoundBox(constr) stopifnot(bb$lb == c(0.0, 0.0)) stopifnot(bb$ub == c(1.0, 1.0))
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