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ship
2006 Dec 01
1
group by
...m lost.
Is there a 'grouping by' function in R which allows this operation much
easier without 'hardwiring' the parameter like I did it?
Code siteA
Weekmin <- min(ship$TransactionWeek);
Weekmax <- max(ship$TransactionWeek);
Week <-Weekmin -1;
repeat{
Week <- Week +1;
ship1 <- subset(ship, ship$TransactionWeek == Week &ship$Testside %in%
c("A"));
ship2 <- subset(ship1,ship1$Yield != 0 );
ship3 <- subset(ship1,is.na(ship1$Yield));
Location <- "A";
ShippedWafer <- nrow(ship1);
SortedWafer <- nrow(ship1)-nrow(ship3);
UnsortedWa...