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- d1 = sort(unique(ddate_ven1),TRUE)
- d2 = sort(unique(ddate_ven2),TRUE)
- d3 = sort(unique(ddate_ven3),TRUE)
- d4 = sort(unique(ddate_ven4),TRUE)
- Qdd1 = {}
- Qdd2 = {}
- Qdd3 = {}
- Qdd4 = {}
- Qd1 = Quantity[Vendor == ven1 & Stent_type == 'DES']
- Qd2 = Quantity[Vendor == ven2 & Stent_type == 'DES']
- Qd3 = Quantity[Vendor == ven3 & Stent_type == 'DES']
- Qd4 = Quantity[Vendor == ven4 & Stent_type == 'DES']
- for(i in 1:length(d1)) {
- Qdd1 = c(Qdd1, sum(Qd1[d1==d1[i]]))
- }
- for(i in 1:length(d2)) {
- Qdd2 = c(Qdd2, sum(Qd2[d2==d2[i]]))
- }
- for(i in 1:length(d3)) {
- Qdd3 = c(Qdd3, sum(Qd3[d3==d3[i]]))
- }
- for(i in 1:length(d4)) {
- Qdd4 = c(Qdd4, sum(Qd4[d4==d4[i]]))
- }
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