[R] Plotting world maps with locations.

[Jibrin Alhassan]

Hello Romanus,
You are to post only the code and the error messages and not all the
information from your terminal in R session.

On Fri, Feb 12, 2021, 4:35 PM Romanus Ejike <romanusejike1971 using gmail.com>
wrote:

> Please, I need help from anyone that can solve this problem.
> I wanted to plot a world map with locations and names of the locations but
> could not. The codes I have tried are as shown below.
> ugwoke using ugwoke-HP-ENVY-Laptop-13-aq0xxx:~/Desktop$ R
>
> R version 4.0.3 (2020-10-10) -- "Bunny-Wunnies Freak Out"
> Copyright (C) 2020 The R Foundation for Statistical Computing
> Platform: x86_64-pc-linux-gnu (64-bit)
>
> R is free software and comes with ABSOLUTELY NO WARRANTY.
> You are welcome to redistribute it under certain conditions.
> Type 'license()' or 'licence()' for distribution details.
>
>   Natural language support but running in an English locale
>
> R is a collaborative project with many contributors.
> Type 'contributors()' for more information and
> 'citation()' on how to cite R or R packages in publications.
>
> Type 'demo()' for some demos, 'help()' for on-line help, or
> 'help.start()' for an HTML browser interface to help.
> Type 'q()' to quit R.
>
> > NMdata <-
>
> read.table("NM1989.txt",col.names=c("SNAME","FNAME","NMTYPE","LAT","LON","ALTI"))
> > library(ggplot2)
> > library(sf)
> Linking to GEOS 3.9.0, GDAL 3.2.0, PROJ 7.2.0
> > library(rnaturalearth)
> > library(rnaturalearthdata)
> > world <- ne_countries(scale = "medium", returnclass = "sf")
> > ggplot(data = world) + geom_sf() + labs( x = "Longitude", y = "Latitude")
> + coord_sf(xlim = c(-180.00, 180.00), ylim = c(-90.00, 90.00), expand =
> FALSE) + ggtitle("World map") + points(NMdata$LON,Nmdata$LAT,col = "red",
> cex = 0.01)
> Error in xy.coords(x, y) : object 'Nmdata' not found
> > ggplot(data = world) + geom_sf() + labs( x = "Longitude", y = "Latitude")
> + coord_sf(xlim = c(-180.00, 180.00), ylim = c(-90.00, 90.00), expand =
> FALSE) + ggtitle("World map") + points(NMdata$LON,NMdata$LAT,col = "red",
> cex = 0.01)
> Error in plot.xy(xy.coords(x, y), type = type, ...) :
>   plot.new has not been called yet
> In addition: Warning messages:
> 1: In xy.coords(x, y) : NAs introduced by coercion
> 2: In xy.coords(x, y) : NAs introduced by coercion
> 3: In (function (display = "", width, height, pointsize, gamma, bg,  :
>   locale not supported by Xlib: some X ops will operate in C locale
> 4: In (function (display = "", width, height, pointsize, gamma, bg,  :
>   X cannot set locale modifiers
> > ggplot(data = world) + geom_sf() + labs( x = "Longitude", y = "Latitude")
> + coord_sf(xlim = c(-180.00, 180.00), ylim = c(-90.00, 90.00), expand =
> FALSE) + ggtitle("World map") + points(NMdata$LON,NMdata$LAT,col = "red",
> cex = 0.01, pch = 20)
> Error in plot.xy(xy.coords(x, y), type = type, ...) :
>   plot.new has not been called yet
> In addition: Warning messages:
> 1: In xy.coords(x, y) : NAs introduced by coercion
> 2: In xy.coords(x, y) : NAs introduced by coercion.
> I have also tried the codes below but it did not show the locations.
> ugwoke using ugwoke-HP-ENVY-Laptop-13-aq0xxx:~/Desktop$ R
>
> R version 4.0.3 (2020-10-10) -- "Bunny-Wunnies Freak Out"
> Copyright (C) 2020 The R Foundation for Statistical Computing
> Platform: x86_64-pc-linux-gnu (64-bit)
>
> R is free software and comes with ABSOLUTELY NO WARRANTY.
> You are welcome to redistribute it under certain conditions.
> Type 'license()' or 'licence()' for distribution details.
>
>   Natural language support but running in an English locale
>
> R is a collaborative project with many contributors.
> Type 'contributors()' for more information and
> 'citation()' on how to cite R or R packages in publications.
>
> Type 'demo()' for some demos, 'help()' for on-line help, or
> 'help.start()' for an HTML browser interface to help.
> Type 'q()' to quit R.
>
> > library("ggplot2")
> > library(sf)
> Linking to GEOS 3.9.0, GDAL 3.2.0, PROJ 7.2.0
> > library("rnaturalearth")
> > library("rnaturalearthdata")
> > theme_set(theme_bw())
> > world <- ne_countries(scale = "medium", returnclass = "sf")
> > class(world)
> [1] "sf"         "data.frame"
> > ggplot(data = world) + geom_sf() + labs( x = "Longitude", y = "Latitude")
> +
> + + ggtitle("World map") + coord_sf(crs = "+proj=laea +lat_0=52 +lon_0=10
> +x_0=4321000 +y_0=3210000 +ellps=GRS80 +units=m +no_defs ")
> Error in +ggtitle("World map") : invalid argument to unary operator
> > ggplot(data = world) + geom_sf() + labs( x = "Longitude", y = "Latitude")
> + ggtitle("World map") + coord_sf(crs = "+proj=laea + lat_0=52 + lon_0=10 +
> x_0=4321000 + y_0=3210000 + ellps=GRS80 + units=m + no_defs ")
> Warning messages:
> 1: In (function (display = "", width, height, pointsize, gamma, bg,  :
>   locale not supported by Xlib: some X ops will operate in C locale
> 2: In (function (display = "", width, height, pointsize, gamma, bg,  :
>   X cannot set locale modifiers.
> I really appreciate any help rendered. Thanks
>
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>
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