Not much to go on, but you might find
vegMeans = aggregate(SoilVegHydro[3:37],SoilVegHydro['Physiogomy'],mean)
and
vegSd = aggregate(SoilVegHydro[3:37],SoilVegHydro['Physiogomy'],sd)
more suitable for your needs. (Not run because I don't know what
SoilVegHydro is.)
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@stat.berkeley.edu
On Tue, 8 Jun 2010, steve_fried...@nps.gov wrote:
Hello,
vegMeans <- by(SoilVegHydro[3:37] , SoilVegHydro$Physiogomy, mean)
vegSD <- by(SoilVegHydro[3:37] , SoilVegHydro$Physiogomy, sd)
write.table(vegMeans,
file="A:\\Work_Area\\Steve\\Hydrology_Data\\data\\vegMeans.txt")
Error in as.data.frame.default(x[[i]], optional = TRUE, stringsAsFactors =
stringsAsFactors) :
cannot coerce class '"by"' into a data.frame
Is there anyway to convert these output objects for use with write.table or
an alternate method such that I can output to a word processing system?
Windows R 2.11.1
Thanks
Steve
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
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and provide commented, minimal, self-contained, reproducible code.
