vstack {CVXR}

Vertical Concatenation

Description

The vertical concatenation of expressions. This is equivalent to rbind when applied to objects with the same number of columns.

Usage

vstack(...)

Arguments

...

Expression objects, vectors, or matrices. All arguments must have the same number of columns.

Value

An Expression representing the concatenated inputs.

Examples

x <- Variable(2)
y <- Variable(3)
c <- matrix(1, nrow = 1, ncol = 5)
prob <- Problem(Minimize(c %*% vstack(x, y)), list(x == c(1,2), y == c(3,4,5)))
result <- solve(prob)
result$value

c <- matrix(1, nrow = 1, ncol = 4)
prob <- Problem(Minimize(c %*% vstack(x, x)), list(x == c(1,2)))
result <- solve(prob)
result$value

A <- Variable(2,2)
C <- Variable(3,2)
c <- matrix(1, nrow = 2, ncol = 2)
prob <- Problem(Minimize(sum(vstack(A, C))), list(A >= 2*c, C == -2))
result <- solve(prob)
result$value

B <- Variable(2,2)
c <- matrix(1, nrow = 1, ncol = 2)
prob <- Problem(Minimize(sum(vstack(c %*% A, c %*% B))), list(A >= 2, B == -2))
result <- solve(prob)
result$value