Ah , thanks Sarah
So that's why the error message changed! I was getting different one earlier.
I had defined rect earlier and apparently, when stripping down the code I
negelected to include it in the example. Renamed rect as rectlib
Now what I get is "Error in eval(expr, envir, enclos) : object 'federal.ps' not
found" which is what I was getting ealier although at one point I was getting
"year not found".
See revised code.
library(ggplot2)
fcs <- structure(list(year = structure(c(954478800, 986014800, 1017550800,
1049086800, 1080709200, 1112245200, 1143781200, 1175313600,
1206936000,
1238472000, 1270008000, 1301544000, 1333166400), class =
c("POSIXct",
"POSIXt"), tzone = ""), federal.ps = c(211925L, 223933L, 237251L,
242737L, 244158L, 243971L, 249932L, 254622L, 263114L, 274370L,
282955L, 282352L, 278092L)), .Names = c("year", "federal.ps"),
class = "data.frame", row.names = c(NA, -13L))
rectlib <- data.frame (xmin = as.POSIXct("2000-03-31", "%Y-%m-%d"),
xmax = as.POSIXct("2006-10-31", "%Y-%m-%d"))
p <- ggplot(fcs, aes(year, federal.ps )) + geom_line()
p + geom_rect(data=rectlib, aes(xmin=xmin, xmax = xmax, ymin=-Inf, ymax =
Inf),
fill='red', alpha=0.2)
###===================End
Code==================================================
John Kane
Kingston ON Canada
> -----Original Message-----
> From: sarah.gos...@gmail.com
> Sent: Fri, 22 Mar 2013 16:49:34 -0400
> To: jrkrid...@inbox.com
> Subject: Re: [R] ggplot2 will not draw a rectangle. Error: ggplot2
> doesn't know how to deal with data of class XXX"
>
> Hi John,
>
> This bit of your code:
>
> geom_rect(data=rect
>
> Your reproducible example doesn't create rect, and rect() already
> exists, so geom_rect() is trying to treat a function as data.
>
> Sarah
>
>
> On Fri, Mar 22, 2013 at 4:42 PM, John Kane <jrkrid...@inbox.com> wrote:
>> What am I missing? When I run the code below I get the error message
>> "Error: ggplot2 doesn't know how to deal with data of class function"
>>
>> Googling suggests a message of "Error: ggplot2 doesn't know how to deal
>> with data of class XXX" is not uncommon but I don't see why I am getting
>> a "function" error unless I am using some reserved word?
>>
>> ##=============Start Code=========================
>> library(ggplot2)
>>
>> fcs <- structure(list(year = structure(c(954478800, 986014800,
>> 1017550800,
>> 1049086800, 1080709200, 1112245200, 1143781200, 1175313600,
>> 1206936000,
>> 1238472000, 1270008000, 1301544000, 1333166400), class =
>> c("POSIXct",
>> "POSIXt"), tzone = ""), federal.ps = c(211925L, 223933L,
>> 237251L,
>> 242737L, 244158L, 243971L, 249932L, 254622L, 263114L,
>> 274370L,
>> 282955L, 282352L, 278092L)), .Names = c("year",
>> "federal.ps"),
>> class = "data.frame", row.names = c(NA, -13L))
>>
>>
>> p <- ggplot(fcs, aes(year, federal.ps )) + geom_line()
>>
>> p + geom_rect(data=rect, aes(xmin=xmin, xmax = xmax, ymin=-Inf, ymax
>> = Inf),
>> fill='red', alpha=0.2)
>> ##=============End Code==========================
>>
>> sessionInfo()
>> R version 2.15.3 (2013-03-01)
>> Platform: i686-pc-linux-gnu (32-bit)
>>
>> locale:
>> [1] LC_CTYPE=en_CA.UTF-8 LC_NUMERIC=C
>> [3] LC_TIME=en_CA.UTF-8 LC_COLLATE=en_CA.UTF-8
>> [5] LC_MONETARY=en_CA.UTF-8 LC_MESSAGES=en_CA.UTF-8
>> [7] LC_PAPER=C LC_NAME=C
>> [9] LC_ADDRESS=C LC_TELEPHONE=C
>> [11] LC_MEASUREMENT=en_CA.UTF-8 LC_IDENTIFICATION=C
>>
>> attached base packages:
>> [1] stats graphics grDevices utils datasets methods base
>>
>> other attached packages:
>> [1] ggplot2_0.9.3
>>
>> loaded via a namespace (and not attached):
>> [1] colorspace_1.2-1 dichromat_2.0-0 digest_0.6.3
>> grid_2.15.3
>> [5] gtable_0.1.2 labeling_0.1 MASS_7.3-23
>> munsell_0.4
>> [9] plyr_1.8 proto_0.3-10 RColorBrewer_1.0-5
>> reshape2_1.2.2
>> [13] scales_0.2.3 stringr_0.6.2
>>
>>
>> John Kane
>> Kingston ON Canada
>>
>>
>
> --
> Sarah Goslee
> http://www.functionaldiversity.org
____________________________________________________________
GET FREE SMILEYS FOR YOUR IM & EMAIL - Learn more at
http://www.inbox.com/smileys
Works with AIM®, MSN® Messenger, Yahoo!® Messenger, ICQ®, Google Talk™ and most
webmails
______________________________________________
R-help@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.
