Displaying 1 result from an estimated 1 matches for "donedat".
2007 Apr 18
2
Data Manipulation using R
...One of the columns is an id variable which is grouped from 1000 through 9000. I need to perform the following operations.
1) Remove all the observations with id's between 6000 and 6999
I tried using this method.
remdat1 <- subset(data, ID<6000)
remdat2 <- subset(data, ID>=7000)
donedat <- rbind(remdat1, remdat2)
I check the last and first entry and found that it did not have ID values 6000. Therefore I think that this might be correct, but is this the most efficient way of doing this?
2) I need to remove observations within columns 3, 4, 6 and 8 when they are negative. For i...