sum_entries function

Sum of Entries

The sum of entries in a vector or matrix. methods

sum_entries(expr, axis = NA_real_, keepdims = FALSE)

## S3 method for class 'Expression'
sum(..., na.rm = FALSE)

Arguments

• expr: An Expression , vector, or matrix.
• axis: (Optional) The dimension across which to apply the function: 1 indicates rows, 2 indicates columns, and NA indicates rows and columns. The default is NA.
• keepdims: (Optional) Should dimensions be maintained when applying the atom along an axis? If FALSE, result will be collapsed into an $n x 1$ column vector. The default is FALSE.
• ...: Numeric scalar, vector, matrix, or Expression objects.
• na.rm: (Unimplemented) A logical value indicating whether missing values should be removed.

Returns

An Expression representing the sum of the entries of the input.

Examples

x <- Variable(2)
prob <- Problem(Minimize(sum_entries(x)), list(t(x) >= matrix(c(1,2), nrow = 1, ncol = 2)))
result <- solve(prob)
result$value
result$getValue(x)

C <- Variable(3,2)
prob <- Problem(Maximize(sum_entries(C)), list(C[2:3,] <= 2, C[1,] == 1))
result <- solve(prob)
result$value
result$getValue(C)
x <- Variable(2)
prob <- Problem(Minimize(sum_entries(x)), list(t(x) >= matrix(c(1,2), nrow = 1, ncol = 2)))
result <- solve(prob)
result$value
result$getValue(x)

C <- Variable(3,2)
prob <- Problem(Maximize(sum_entries(C)), list(C[2:3,] <= 2, C[1,] == 1))
result <- solve(prob)
result$value
result$getValue(C)