sum_expr {ompr} | R Documentation |
This functions helps to create dynamic sum expression based on external variables. Should only be used within other 'ompr' functions.
sum_expr(expr, ...)
expr |
an expression that can be expanded to a sum |
... |
bind variables in expr using dots. See examples. |
the expanded sum as an AST
# create a sum from x_1 to x_10 sum_expr(x[i], i = 1:10) # create a sum from x_2 to x_10 with even indexes sum_expr(x[i], i = 1:10, i %% 2 == 0)