[R-sig-Geo] converting latlong in decimal degrees to utm

[Bede-Fazekas Ákos]

Dear Moses,
you need firstly install the package "sp", then load it, and after that you should convert your data.frame to SpatialPoints or SpatialPointsDataFrame by setting the coordinates.

if (!("sp" %in% row.names(installed.packages()))){ # if package "sp" not yet installed
	suppressMessages(install.packages("sp", verbose = FALSE, quiet = TRUE, INSTALL_opts = c("--no-lock"), repos = "http://cran.us.r-project.org")) # installs it
} # if
library(sp) # loads it
coordinates(data) <- c("x", "y") # sets coordinates
if (class(data) == "SpatialPoints") {writeLines("Well done.")} # Now you can set projection.

Hope it helps,
Ákos

-----Original Message-----
From: R-sig-Geo [mailto:r-sig-geo-bounces at r-project.org] On Behalf Of moses selebatso
Sent: 2015. július 18. 17:27
To: R-sig-Geo at r-project.org
Subject: [R-sig-Geo] converting latlong in decimal degrees to utm

I am trying to get my data (sample below) to utm before I can use it for Kernel Density Estimates. Can someone help?
> data<-read.csv("clipboard",sep="\t")
> head(data)
          x        y
1 -21.76580 23.20185
2 -21.76692 23.20126
3 -21.76690 23.20127
4 -21.76761 23.20338
5 -21.77223 23.20354
6 -21.77193 23.20327
> proj4string(data) <- CRS("+proj=utm +zone=34 +south +ellps=WGS84 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs")
Error in (function (classes, fdef, mtable)  : 
  unable to find an inherited method for function ‘proj4string<-’ for signature ‘"data.frame", "CRS"’
Thank you, in advance. Moses SELEBATSO

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