[R] Adding Two-Headed Arrow in map legend
David Winsemius
dwinsemius at comcast.net
Sat Apr 9 20:18:03 CEST 2016
> On Apr 9, 2016, at 10:46 AM, Miluji Sb <milujisb at gmail.com> wrote:
>
> Dear David,
>
> Thank you for your answer. Sorry for the embarrassing mistake. However, even with when I generate a map for the whole world using:
>
> eps <- mapCountryData(n, nameColumnToPlot="eps_score", mapTitle="EPS Score",colourPalette=colourPalette,
> catMethod="fixedWidth", missingCountryCol = "white", addLegend=FALSE)
>
> And then use:
>
> do.call(addMapLegend, c(eps, legendLabels="none", arrows(-100,-140,100,-140,code=3)))
I do get an arrow using same version of R and OSX. See attached. (I think that png images will be accepted by the mailserver.)
--
David.
>
> Only a legend with the colours is generated, no arrows. My session info is below. Thanks again!
>
> R version 3.2.4 (2016-03-10)
> Platform: x86_64-apple-darwin13.4.0 (64-bit)
> Running under: OS X 10.11.2 (El Capitan)
>
> 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] countrycode_0.18 ggplot2_2.1.0 RColorBrewer_1.1-2 foreign_0.8-66 maptools_0.8-39 rworldmap_1.3-6
> [7] sp_1.2-0
>
> loaded via a namespace (and not attached):
> [1] Rcpp_0.12.4 lattice_0.20-33 grid_3.2.4 plyr_1.8.3 gtable_0.2.0 spam_1.3-0
> [7] scales_0.4.0 tools_3.2.4 munsell_0.4.3 maps_3.1.0 fields_8.3-6 colorspace_1.2-6
>
> On Sat, Apr 9, 2016 at 7:34 PM, David Winsemius <dwinsemius at comcast.net> wrote:
>
> > On Apr 9, 2016, at 8:13 AM, Miluji Sb <milujisb at gmail.com> wrote:
> >
> > Forgot to copy the list
> >
> > Dear Jim,
> >
> > Thank you for your reply. I must be doing something wrong, If this is my
> > command to plot a map of Europe:
> >
> > eps_europe <- mapCountryData(n, nameColumnToPlot="eps_score", mapTitle="EPS
> > Score - Europe",colourPalette=colourPalette,
> > catMethod="fixedWidth", missingCountryCol =
> > "white", mapRegion="Europe", addLegend=FALSE)
> >
> > The following command does not seem to add the arrow. What am I doing wrong?
> >
> > do.call(addMapLegend, c(eps_europe, legendLabels="none",
> > arrows(-100,-140,100,-140,code=3)))
> >
>
> Your earlier question had a full world map. That was the context for Jim's reply, which did plot a two headed arrow above the legend in your earlier question. Now you have restricted the plot region to Europe so the coordinates of -100,-140,100,-140 no longer are on the visible plot area. You need to decide where you want the arrows using sensible coordinates.
>
> --
> David.
>
>
> > Thank you again. I really appreciate it.
> >
> > Sincerely,
> >
> > Milu
> >
> > On Sat, Apr 9, 2016 at 12:20 PM, Jim Lemon <drjimlemon at gmail.com> wrote:
> >
> >> Hi Miluji,
> >> Try this:
> >>
> >> arrows(-100,-140,100,-140,code=3)
> >>
> >> Jim
> >>
> >>
> >> On Fri, Apr 8, 2016 at 10:24 PM, Miluji Sb <milujisb at gmail.com> wrote:
> >>> I am trying to draw maps for the world using:
> >>>
> >>> library(rworldmap)
> >>> library(maptools)
> >>> library(RColorBrewer)
> >>>
> >>>
> >>> tmp2<- dput(head(pece,10))
> >>> structure(list(iso3 = c("AUS", "AUT", "BEL", "CAN", "CHE", "CHL",
> >>> "CZE", "DEU", "DNK", "ESP"), eps_score = c(0.877343773841858,
> >>> 2.68984365463257, 1.31406247615814, 1.98046875, 2.61666655540466,
> >>> NA, 1.44414067268372, 2.34257817268372, 2.89687490463257,
> >> 2.15937495231628
> >>> ), gov_eff = c(1.76499999562899, 1.85666667421659, 1.74500000476837,
> >>> 1.88416666785876, 1.99181815710935, 1.21499997377396, 0.865833342075348,
> >>> 1.64999999602636, 2.15416664878527, 1.36833332975705), sh_va_enint =
> >>> c(13.4375638961792,
> >>> 8.90904521942139, 10.368335723877, 14.0469560623169, NA, NA,
> >>> 13.5679216384888, 9.67090892791748, 10.5978908538818, 8.34146690368652
> >>> ), rd_in_va = c(2.17547988891602, 2.47147130966187, 2.53955459594727,
> >>> 2.01138758659363, NA, NA, 1.49587619304657, 2.72330951690674,
> >>> 2.5316367149353, 1.48551619052887)), datalabel = "", time.stamp = " 9 Mar
> >>> 2016 17:43", .Names = c("iso3",
> >>> "eps_score", "gov_eff", "sh_va_enint", "rd_in_va"), formats = c("%9s",
> >>> "%8.0g", "%10.0g", "%9.0g", "%9.0g"), types = c(6L, 254L, 255L,
> >>> 254L, 254L), val.labels = c("", "", "", "", ""), var.labels = c("",
> >>> "(mean) eps_score", "(mean) gov_eff", "(mean) sh_va_enint", "(mean)
> >>> rd_in_va"
> >>> ), expansion.fields = list(c("_dta", "ReS_i", "countrycode"),
> >>> c("_dta", "ReS_ver", "v.2"), c("_dta", "ReS_j", "year"),
> >>> c("_dta", "ReS_str", "0"), c("_dta", "ReS_Xij", "a_"), c("_dta",
> >>> "__JVarLab", "ACT"), c("_dta", "__XijVarLabrdd_", "(sum) rdd"
> >>> ), c("_dta", "__XijVarLabp", "Value"), c("_dta", "__XijVarLabpop",
> >>> "Population"), c("_dta", "__XijVarLabest_lu_f", "Source of lu"
> >>> ), c("_dta", "__XijVarLablu", "Percentage of No Schooling"
> >>> ), c("_dta", "__XijVarLabest_lp_f", "Source of lp"), c("_dta",
> >>> "__XijVarLablp", "Percentage of Primary"), c("_dta", "__XijVarLablh",
> >>> "Percentage of Tertiary"), c("_dta", "__XijVarLabest_lh_f",
> >>> "Source of lh"), c("_dta", "__XijVarLabls", "Percentage of Secondary"
> >>> ), c("_dta", "__XijVarLabest_ls_f", "Source of ls"), c("_dta",
> >>> "__XijVarLabvalue", "Value"), c("_dta", "_TStvar", "year"
> >>> ), c("_dta", "_TSpanel", "id2"), c("_dta", "_TSdelta",
> >>> "+1.0000000000000X+000"
> >>> ), c("_dta", "_TSitrvl", "1"), c("_dta", "tis", "year"),
> >>> c("_dta", "iis", "id2")), version = 12L, row.names = c("1",
> >>> "2", "3", "4", "5", "6", "7", "8", "9", "10"), class = "data.frame")
> >>> n <- joinCountryData2Map(pece, joinCode="ISO3", nameJoinColumn="iso3")
> >>> n <- n[-which(row.names(n)=='Antarctica'),]
> >>>
> >>> # EPS
> >>> colourPalette <- rev(brewer.pal(7, "RdYlGn"))
> >>>
> >>> eps <- mapCountryData(n, nameColumnToPlot="eps_score", mapTitle="EPS
> >>> Score",colourPalette=colourPalette,
> >>> catMethod="fixedWidth", missingCountryCol =
> >> "white",
> >>> addLegend=FALSE)
> >>> do.call(addMapLegend, c(eps, legendLabels="all", legendWidth=0.5))
> >>>
> >>> Instead of adding numeric based legend, I would like to add a two-headed
> >>> arrow with some text. I would be grateful for any help. Thank you!
> >>>
> >>> Sincerely,
> >>>
> >>> Milu
> >>>
> >>> [[alternative HTML version deleted]]
> >>>
> >>> ______________________________________________
> >>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >>> 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.
> >>
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > 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.
>
> David Winsemius
> Alameda, CA, USA
>
>
David Winsemius
Alameda, CA, USA
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