A matrix is for situations where every element is of the same class
but your columns have different classes so use a data frame:
DF - data.frame(a = 11:15, b = letters[1:5], stringsAsFactors = FALSE)
subset(DF, a %in% 11:13)
subset(DF, a %in% c(0, 11:13)) # same
Suggest you review the Introduction to R manual and look at ?data.frame,
?subset and ?%in%
On 9/4/07, Cory Nissen [EMAIL PROTECTED] wrote:
Okay, I want to do something similar to SAS proc format.
I usually do this...
a - NULL
a$divisionOld - c(1,2,3,4,5)
divisionTable - matrix(c(1, New England,
2, Middle Atlantic,
3, East North Central,
4, West North Central,
5, South Atlantic),
ncol=2, byrow=T)
a$divisionNew[match(a$divisionOld, divisionTable[,1])] - divisionTable[,2]
But how do I handle the case where...
a$divisionOld - c(0,1,2,3,4,5) #no format available for 0, this throws an
error.
OR
divisionTable - matrix(c(1, New England,
2, Middle Atlantic,
3, East North Central,
4, West North Central,
5, South Atlantic,
6, East South Central,
7, West South Central,
8, Mountain,
9, Pacific),
ncol=2, byrow=T)
There are extra formats available... this throws a warning.
Thanks
Cory
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