R help - Jun 2010 - restructuring "by" output for use with write.table

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_Friedman at nps.gov
Office (305) 224 - 4282
Fax     (305) 224 - 4147

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
 					 spector at stat.berkeley.edu


On Tue, 8 Jun 2010, Steve_Friedman at 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_Friedman at nps.gov
> Office (305) 224 - 4282
> Fax     (305) 224 - 4147
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
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>