[R-pkg-devel] “unable to find an inherited method” error in choroplethr package

Mon Mar 28 23:07:15 CEST 2016

I am using R 3.2.4 for mac. Here is my sessionInfo():

> sessionInfo()
R version 3.2.4 (2016-03-10)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
Running under: OS X 10.10.5 (Yosemite)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] choroplethr_3.5.1 XML_3.98-1.4      plyr_1.8.3        stringr_1.0.0

loaded via a namespace (and not attached):
 [1] Rcpp_0.12.4         RColorBrewer_1.1-2  bitops_1.0-6
 tools_3.2.4
 [5] rpart_4.1-10        gtable_0.2.0        lattice_0.20-33     png_0.1-7

 [9] WDI_2.4             DBI_0.3.1           mapproj_1.2-4
parallel_3.2.4
[13] proto_0.3-10        gridExtra_2.2.1     dplyr_0.4.3
cluster_2.0.3
[17] maps_3.1.0          RgoogleMaps_1.2.0.7 grid_3.2.4
 nnet_7.3-12
[21] R6_2.1.2            jpeg_0.1-8          survival_2.38-3
foreign_0.8-66
[25] RJSONIO_1.3-0       sp_1.1-1            ggmap_2.6.1
latticeExtra_0.6-28
[29] Formula_1.2-1       reshape2_1.4.1      ggplot2_2.1.0
magrittr_1.5
[33] Hmisc_3.17-2        scales_0.4.0        acs_2.0
splines_3.2.4
[37] assertthat_0.1      colorspace_1.2-6    geosphere_1.5-1
stringi_1.0-1
[41] acepack_1.3-3.3     RCurl_1.95-4.8      munsell_0.4.3
rjson_0.2.15
>

On Mon, Mar 28, 2016 at 2:01 PM, Uwe Ligges <ligges at statistik.tu-dortmund.de
> wrote:

> I just tried your code with acs 2.0 and choroplethr 3.5.1 under R-3.3.0
> alpha and got a result rather than an error...
>
> Are you using a different version of anything?
>
> Best,
> Uwe Ligges
>
>
>
> On 28.03.2016 22:49, arilamstein at gmail.com wrote:
>
>> Unfortunately I am still getting the same error:
>>
>> install.packages(c("choroplethr", "acs"))
>> library(acs)
>> api.key.install("f8b2a6df01479981aef39577b3c4466f5a4c8274")
>> detach("package:acs", unload=TRUE)
>>
>> library(choroplethr)
>> get_state_demographics()
>> Error in (function (classes, fdef, mtable)  :
>>              unable to find an inherited method for function ‘geography’
>> for signature ‘"matrix"’
>>
>> Someone suggested that I import the acs class in my NAMESPACE. But even
>> after adding:
>>
>> importClassesFrom(acs,acs)
>>
>> I get the same error.
>>
>>
>> On Sun, Mar 27, 2016 at 11:52 AM, Uwe Ligges
>> <ligges at statistik.tu-dortmund.de
>> <mailto:ligges at statistik.tu-dortmund.de>> wrote:
>>
>>     Has this been resolved now?
>>
>>     I cannot reproduce the problem as I get:
>>
>>      > library(choroplethr)
>>      >
>>      > ?get_state_demographics
>>     starting httpd help server ... done
>>     >
>>     > get_state_demographics()
>>     Error in (function (classes, fdef, mtable)  :
>>        unable to find an inherited method for function ‘geography’ for
>>     signature ‘"logical"’
>>     In addition: Warning message:
>>     In acs::acs.fetch(geography = state_geo, table.number = "B03002",  :
>>        'key' required to access Census API site for download;
>>        See http://www.census.gov/developers/ to request a key
>>        and/or use 'key=' (or run 'api.key.install()') to avoid this error.
>>
>>
>>     Best,
>>     Uwe Ligges
>>
>>
>>
>>     On 25.03.2016 21 <tel:25.03.2016%2021>:55, arilamstein at gmail.com
>>
>>     <mailto:arilamstein at gmail.com> wrote:
>>
>>         Recently the functionality in the choroplethr
>>         <https://cran.r-project.org/web/packages/choroplethr/index.html>
>>         package
>>         that depends on the acs
>>         <https://cran.r-project.org/web/packages/acs/index.html> package
>> has
>>         stopped working. I've been able to narrow down the cause, but
>>         cannot figure
>>         out how to fix it. Any help would be appreciated. To reproduce
>>         the error
>>         you can type:
>>
>>         install.packages("choroplethr")
>>
>>         library(choroplethr)
>>
>>         ?get_state_demographics
>>
>>         get_state_demographics()
>>
>>         Error in (function (classes, fdef, mtable)  :
>>
>>         unable to find an inherited method for function ‘geography’ for
>>         signature
>>         "matrix"’
>>
>>         (Note: you will need to set a census API key for this example to
>>         "work".
>>         See here
>>         <
>> https://cran.r-project.org/web/packages/choroplethr/vignettes/e-mapping-us-census-data.html
>> >
>>         for instructions).
>>
>>         I believe that this error was introduced by version 2.0 of the
>>         acs package,
>>         which was just released. I suspect that choroplethr is either
>>         not importing
>>         something that it should be importing, or acs is not exporting
>>         something
>>         that it should be exporting. For example, the problem can be
>>         fixed by
>>         simply loading the acs package first:
>>
>>         library(acs)
>>
>>         get_state_demographics()
>>
>>         <valid result>
>>
>>         The acs package uses both S3 and S4, which I do not have much
>>         experience
>>         with. I have been reading Hadley's excellent chapter on Namespaces
>>         <http://r-pkgs.had.co.nz/namespace.html>, and tweaked various
>> import
>>         directives in the choroplethr package (the actual code that
>>         crashes is here
>>         <
>> https://github.com/arilamstein/choroplethr/blob/master/R/get_state_demograhpics.R#L42
>> >).
>>         But I am still not sure how to fix this problem.. Any help would
>> be
>>         appreciated.
>>
>>                  [[alternative HTML version deleted]]
>>
>>         ______________________________________________
>>         R-package-devel at r-project.org
>>         <mailto:R-package-devel at r-project.org> mailing list
>>         https://stat.ethz.ch/mailman/listinfo/r-package-devel
>>
>>
>>

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