[R] ggplot2 will not draw a rectangle. Error: ggplot2 doesn't know how to deal with data of class XXX"
Jeff Newmiller
jdnewmil at dcn.davis.CA.us
Fri Mar 22 23:42:22 CET 2013
ggplot(fcs,aes(x=year,y=federal.ps))+geom_line()+geom_rect(data=rectlib,aes(x=xmin,y=Inf,xmin=xmin,xmax=xmax),ymin=-Inf,ymax=Inf,fill="red",alpha=0.2)
For some reason x and y must be defined as data sources for all layers.
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John Kane <jrkrideau at inbox.com> wrote:
>Thanks, that shows that I am not making one of my "really stupid"
>mistakes.
>
>What is really annoying is that I can find examples on the web that
>work just fine and I cannot se how my example is that different. I
>even tried changing from using as.Date() to POSIXct() and to POSIXlt in
>case the dates were the problem but with no luck.
>
>I think it's time for dinner here so I will have another look at it
>tommorrow --hopefully someone will see the problem.
>
>Thanks again.
>
>John Kane
>Kingston ON Canada
>
>
>> -----Original Message-----
>> From: sarah.goslee at gmail.com
>> Sent: Fri, 22 Mar 2013 17:29:42 -0400
>> To: jrkrideau at inbox.com
>> Subject: Re: [R] ggplot2 will not draw a rectangle. Error: ggplot2
>> doesn't know how to deal with data of class XXX"
>>
>> I get "year not found" and we've exceeded my ability to debug ggplot
>> code. I hope someone else chimes in: I'd like to know what the answer
>> is too.
>>
>>
>> Sarah
>>
>> On Fri, Mar 22, 2013 at 5:01 PM, John Kane <jrkrideau at inbox.com>
>wrote:
>>> 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.goslee at gmail.com
>>>> Sent: Fri, 22 Mar 2013 16:49:34 -0400
>>>> To: jrkrideau at 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 <jrkrideau at 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
>>>>>
>>>>>
>>
>>
>> --
>> Sarah Goslee
>> http://www.functionaldiversity.org
>
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