Thanks to everyone on this.
Both Jeff's and Rui's approach worked. It looks like they do equivalent things
, that is supplying the x and y values in geom_rect. The worst of it is I
think I saw an example using the NULL NULL approach and did not realise the
significance of it.
John Kane
Kingston ON Canada
> -----Original Message-----
> From: jdnew...@dcn.davis.ca.us
> Sent: Fri, 22 Mar 2013 15:42:22 -0700
> To: jrkrid...@inbox.com, sarah.gos...@gmail.com
> Subject: Re: [R] ggplot2 will not draw a rectangle. Error: ggplot2
> doesn't know how to deal with data of class XXX"
>
> 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.
> ---------------------------------------------------------------------------
> Jeff Newmiller The ..... ..... Go
> Live...
> DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live
> Go...
> Live: OO#.. Dead: OO#.. Playing
> Research Engineer (Solar/Batteries O.O#. #.O#. with
> /Software/Embedded Controllers) .OO#. .OO#.
> rocks...1k
> ---------------------------------------------------------------------------
> Sent from my phone. Please excuse my brevity.
>
> John Kane <jrkrid...@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.gos...@gmail.com
>>> Sent: Fri, 22 Mar 2013 17:29:42 -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"
>>>
>>> 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 <jrkrid...@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.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
>>>>>>
>>>>>>
>>>
>>>
>>> --
>>> Sarah Goslee
>>> http://www.functionaldiversity.org
>>
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