Horizontal Concatenation
The horizontal concatenation of expressions.
This is equivalent to cbind when applied to objects with the same number of rows.
hstack(...)
... |
Expression objects, vectors, or matrices. All arguments must have the same number of rows. |
An Expression representing the concatenated inputs.
x <- Variable(2) y <- Variable(3) c <- matrix(1, nrow = 1, ncol = 5) prob <- Problem(Minimize(c %*% t(hstack(t(x), t(y)))), list(x == c(1,2), y == c(3,4,5))) result <- solve(prob) result$value c <- matrix(1, nrow = 1, ncol = 4) prob <- Problem(Minimize(c %*% t(hstack(t(x), t(x)))), list(x == c(1,2))) result <- solve(prob) result$value A <- Variable(2,2) C <- Variable(3,2) c <- matrix(1, nrow = 2, ncol = 2) prob <- Problem(Minimize(sum_entries(hstack(t(A), t(C)))), list(A >= 2*c, C == -2)) result <- solve(prob) result$value result$getValue(A) D <- Variable(3,3) expr <- hstack(C, D) obj <- expr[1,2] + sum(hstack(expr, expr)) constr <- list(C >= 0, D >= 0, D[1,1] == 2, C[1,2] == 3) prob <- Problem(Minimize(obj), constr) result <- solve(prob) result$value result$getValue(C) result$getValue(D)
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