'How do I choose the max sum of one column while the sum of another column is less than constant in R?
Say I have a data frame with 2 columns x and y.
How do I choose 3 elements from x so that it's sum is the largest possible while the sum of y stays under a certain amount.
x y
1 50 5
2 25 6
3 35 3
4 45 7
5 12 9
e.g. I want the sum of y to be <= 20 and the sum of x to be as large as possible. Then the largest sum of 3 elements from x would be entries 1,3,4 (50+35+45). What function can I use to do this?
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