[R-sig-Geo] [R-sig-eco] scatter plot of coordinates

[Roland Kaiser]

Julia,

my preferred way of plotting spatial data
is to use spatial classes as provided by package(sp).

library(sp)
library(maps)

pts <- data.frame(lng = seq(10,15,1),
		lat = seq(45,50,1),
		date = seq(2000,2005,1))

#	coerce to class SpatialPointsDataFrame		
coordinates(pts) <- ~lng+lat

#	attribute date is stored in slot data
slot(pts, "data") # equivalent to pts at data

map(xlim = c(8,17), ylim = c(43,52))
points(df)
text(df, labels = df at data$date)

Cheers,

Rolond

> Hello!
> I have a dataset with the date and positions -  Lat and Long columns
> How do I make a scatter  plot?
> Do I have to cbind the Lat and Long columns?
> Any suggestions will be much appreciated!
> Thank you
> Julia
>
> 	[[alternative HTML version deleted]]
>
> _______________________________________________
> R-sig-ecology mailing list
> R-sig-ecology at r-project.org
> https://stat.ethz.ch/mailman/listinfo/r-sig-ecology