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Sep 11th, 2018
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  1. d1 = sort(unique(ddate_ven1),TRUE)
  2. d2 = sort(unique(ddate_ven2),TRUE)
  3. d3 = sort(unique(ddate_ven3),TRUE)
  4. d4 = sort(unique(ddate_ven4),TRUE)
  5. Qdd1 = {}
  6. Qdd2 = {}
  7. Qdd3 = {}
  8. Qdd4 = {}
  9. Qd1 = Quantity[Vendor == ven1 & Stent_type == 'DES']
  10. Qd2 = Quantity[Vendor == ven2 & Stent_type == 'DES']
  11. Qd3 = Quantity[Vendor == ven3 & Stent_type == 'DES']
  12. Qd4 = Quantity[Vendor == ven4 & Stent_type == 'DES']
  13. for(i in 1:length(d1)) {
  14.   Qdd1 = c(Qdd1, sum(Qd1[d1==d1[i]]))
  15. }
  16. for(i in 1:length(d2)) {
  17.   Qdd2 = c(Qdd2, sum(Qd2[d2==d2[i]]))
  18. }
  19. for(i in 1:length(d3)) {
  20.   Qdd3 = c(Qdd3, sum(Qd3[d3==d3[i]]))
  21. }
  22. for(i in 1:length(d4)) {
  23.   Qdd4 = c(Qdd4, sum(Qd4[d4==d4[i]]))
  24. }
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