Vertical Concatenation
The vertical concatenation of expressions. This is equivalent to rbind when applied to objects with the same number of columns.
vstack(...)
... |
Expression objects, vectors, or matrices. All arguments must have the same number of columns. |
An Expression representing the concatenated inputs.
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
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