On 08/11/2016 12:09 PM, Shaney, Kyle J wrote:
Hi All,I am trying to export a shapefile of a minimum convex polygon, but I receive the following error message: Error: is(x, "SpatialPolygonsDataFrame") is not TRUE I was able to successfully get my minimum convex polygon and plot it in R using the following code: PID208 <- read.csv(file="PID208.csv", header = TRUE, sep = ",") head(PID208) Name X Y X1 Y2 sex age Receive.Time 1 PID208 391734 6744220 -148.9906 60.81855 2 3 2015.06.18 21:12:20 2 PID208 391738 6744219 -148.9905 60.81855 2 3 2015.06.18 22:50:30 3 PID208 391739 6744229 -148.9905 60.81864 2 3 2015.06.04 20:41:52 4 PID208 391748 6744229 -148.9904 60.81864 2 3 2015.06.04 20:44:27 5 PID208 391748 6744229 -148.9904 60.81864 2 3 2015.06.04 20:44:27 6 PID208 391743 6744229 -148.9904 60.81864 2 3 2015.06.04 22:07:07? xy<- SpatialPoints(PID208 [2:3]) mcp(xy, percent=95) mcp(xy, percent=95)$area #to find actual area covered plot(mcp(xy,percent=100)) Anybody know what I might be missing to successfully export the file for use in GIS?
You don't say how you're trying to export it, but you are creating a SpatialPoints object, and the error message says something wants a SpatialPolygonsDataFrame object. So you need to convert it.
Duncan Murdoch ______________________________________________ R-help@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.
