[Ricardo Rodriguez] Your XEN ICT Team
2008-Feb-12 08:23 UTC
[R] fun.aggregate=mean in reshape
Hi all,
We are facing a problem while introducing ourselves to Reshape package
use. Melt seems to work fine, but cast fails when we use mean as
fun.aggregate. As you see here, length and sum work fine, but mean
throws this same error whatever dataset we use.
> cast(aqm, month ~ variable, length)
month ozone solar.r wind temp
1 5 26 27 31 31
2 6 9 30 30 30
3 7 26 31 31 31
4 8 26 28 31 31
5 9 29 30 30 30
> cast(aqm, month ~ variable, sum)
month ozone solar.r wind temp
1 5 614 4895 360.3 2032
2 6 265 5705 308.0 2373
3 7 1537 6711 277.2 2601
4 8 1559 4812 272.6 2603
5 9 912 5023 305.4 2307
> cast(aqm, month ~ variable, mean)
Error in get(as.character(FUN), mode = "function", envir = envir) :
variable "fun" of mode "function" was not found
>
Our environment:
> version
_
platform i386-apple-darwin8.10.1
arch i386
os darwin8.10.1
system i386, darwin8.10.1
status
major 2
minor 6.2
year 2008
month 02
day 08
svn rev 44383
language R
version.string R version 2.6.2 (2008-02-08)
> installed.packages()
reshape "reshape"
"/Library/Frameworks/R.framework/Resources/library" "0.8.0"
NA NA
Please, could you help use to work out this issue? Thanks!
--
Ricardo Rodr?guez
Your XEN ICT Team
You can use aggregate:
aggregate(data[,c("ozone", "solar.r", "wind",
"temp")],
list(month=data$month), mean)
On 12/02/2008, [Ricardo Rodriguez] Your XEN ICT Team <webmaster at
xen.net> wrote:> Hi all,
>
> We are facing a problem while introducing ourselves to Reshape package
> use. Melt seems to work fine, but cast fails when we use mean as
> fun.aggregate. As you see here, length and sum work fine, but mean
> throws this same error whatever dataset we use.
>
> > cast(aqm, month ~ variable, length)
> month ozone solar.r wind temp
> 1 5 26 27 31 31
> 2 6 9 30 30 30
> 3 7 26 31 31 31
> 4 8 26 28 31 31
> 5 9 29 30 30 30
> > cast(aqm, month ~ variable, sum)
> month ozone solar.r wind temp
> 1 5 614 4895 360.3 2032
> 2 6 265 5705 308.0 2373
> 3 7 1537 6711 277.2 2601
> 4 8 1559 4812 272.6 2603
> 5 9 912 5023 305.4 2307
> > cast(aqm, month ~ variable, mean)
> Error in get(as.character(FUN), mode = "function", envir = envir)
:
> variable "fun" of mode "function" was not found
> >
>
>
> Our environment:
>
> > version
> _
> platform i386-apple-darwin8.10.1
> arch i386
> os darwin8.10.1
> system i386, darwin8.10.1
> status
> major 2
> minor 6.2
> year 2008
> month 02
> day 08
> svn rev 44383
> language R
> version.string R version 2.6.2 (2008-02-08)
>
>
> > installed.packages()
>
> reshape "reshape"
> "/Library/Frameworks/R.framework/Resources/library"
"0.8.0"
> NA NA
>
>
> Please, could you help use to work out this issue? Thanks!
>
> --
> Ricardo Rodr?guez
> Your XEN ICT Team
>
> ______________________________________________
> 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
> and provide commented, minimal, self-contained, reproducible code.
>
--
Henrique Dallazuanna
Curitiba-Paran?-Brasil
25? 25' 40" S 49? 16' 22" O
[Ricardo Rodriguez] Your XEN ICT Team said the following on 2/12/2008 12:23 AM:> Hi all, > > We are facing a problem while introducing ourselves to Reshape package > use. Melt seems to work fine, but cast fails when we use mean as > fun.aggregate. As you see here, length and sum work fine, but mean > throws this same error whatever dataset we use. > > > cast(aqm, month ~ variable, length) > month ozone solar.r wind temp > 1 5 26 27 31 31 > 2 6 9 30 30 30 > 3 7 26 31 31 31 > 4 8 26 28 31 31 > 5 9 29 30 30 30 > > cast(aqm, month ~ variable, sum) > month ozone solar.r wind temp > 1 5 614 4895 360.3 2032 > 2 6 265 5705 308.0 2373 > 3 7 1537 6711 277.2 2601 > 4 8 1559 4812 272.6 2603 > 5 9 912 5023 305.4 2307 > > cast(aqm, month ~ variable, mean) > Error in get(as.character(FUN), mode = "function", envir = envir) : > variable "fun" of mode "function" was not found > > > > > Our environment: > > > version > _ > platform i386-apple-darwin8.10.1 > arch i386 > os darwin8.10.1 > system i386, darwin8.10.1 > status > major 2 > minor 6.2 > year 2008 > month 02 > day 08 > svn rev 44383 > language R > version.string R version 2.6.2 (2008-02-08) > > > > installed.packages() > > reshape "reshape" > "/Library/Frameworks/R.framework/Resources/library" "0.8.0" > NA NA > > > Please, could you help use to work out this issue? Thanks! >Do you have an object called 'mean' that's masking the base::mean function? I can replicate your error using the following: > library(reshape) > names(airquality) <- tolower(names(airquality)) > aqm <- melt(airquality, id=c("month", "day"), na.rm=TRUE) > mean <- 1 > cast(aqm, month ~ variable, mean) Error in get(as.character(FUN), mode = "function", envir = envir) : variable "fun" of mode "function" was not found > cast(aqm, month ~ variable, base::mean) month ozone solar.r wind temp 1 5 23.61538 181.2963 11.622581 65.54839 2 6 29.44444 190.1667 10.266667 79.10000 3 7 59.11538 216.4839 8.941935 83.90323 4 8 59.96154 171.8571 8.793548 83.96774 5 9 31.44828 167.4333 10.180000 76.90000 > find("mean") [1] ".GlobalEnv" "package:base" HTH, --sundar
> Of course your reasoning is clear and an in better knowledge about R > will help me to better interpret its error messages in the future. But > for an entry-level R user like me a conflict warning will be quite helpful.The next version of reshape should do better - I check whether fun.aggregate is much a function much earlier on, so the error message should be more informative. Hadley -- http://had.co.nz/