On Aug 30, 2011, at 10:00 PM, Markus Weisner wrote:
snipped long preamble:
Now I have a more complicated
problem and I need help. Assuming the following factor:
B = as.factor(c("Engine 1", "Engine 10", "Ladder 3", "Engine 3",
"Ladder 10",
"Engine 10"))
levels(B)
I would like the factor ordered first by the proceeding unit type
and then
ordered by the following integer. In this case, I would like to see
this
order: Engine 1, Engine 3, Engine 10, Ladder 3, Ladder 10. I have
tried
many different ways of separating out the unit type from the number,
but am
having trouble figuring out a good way of achieving this factor
order. For
such a small example, I could obviously manually change the order,
but I am
dealing with much larger datasets with many unit types and up to 20
different numbers for each unit type. Having an automated way of
ordering
these units would be a huge help. Thanks in advance for any help
you can
provide.
library(gtools)
?mixedsort
--Markus Weisner
[[alternative HTML version deleted]]
--
David Winsemius, MD
West Hartford, CT
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