I am struggling with solving below optimization in R. It was easy for me to do with excel solver but I am not able to do same problem in R. I don’t have much experience in optimization in R Problem is to assign when a particular activity should be a done over the time period. A1, A2,…, A12 are 12 activities which are done in a field. 0 stands for not assigned, 1 stands for assigned.

Constraints are -

- A2 should happen after A1 is completed, A3 should occur after A2 is complete and so on
- A3, A5, A6 - only two of these activities can happen on a particular day
- Each activity should happen in a field (in excel solver, this constraint is defined by taking row sum equals to one)

It would be a great help, if anyone can help in solving this problem. I have attached image for better understanding of this problem. Also,**please let me know if there is any site or book, rich in examples on “how to solve optimization problems in R”**.