write STFDF to table forms
create table forms of STFDF objects
## S3 method for class 'STFDF' unstack(x, form, which = 1, ...) ## S3 method for class 'STFDF' as.data.frame(x, row.names, ...)
x |
object of class |
form |
formula; can be omitted |
which |
column name or number to have unstacked |
row.names |
row.names for the data.frame returned |
... |
arguments passed on to the functions unstack or as.data.frame |
unstack returns the data in wide format, with each
row representing a spatial entity and each column a time; see
unstack for details and default behaviour.
as.data.frame returns the data.frame in long format,
where the coordinates of the spatial locations (or line starting
coordinates, or polygon center points) and time stamps are recycled
accordingly.
sp = cbind(x = c(0,0,1), y = c(0,1,1))
row.names(sp) = paste("point", 1:nrow(sp), sep="")
library(sp)
sp = SpatialPoints(sp)
library(xts)
time = xts(1:4, as.POSIXct("2010-08-05")+3600*(10:13))
m = c(10,20,30) # means for each of the 3 point locations
mydata = rnorm(length(sp)*length(time),mean=rep(m, 4))
IDs = paste("ID",1:length(mydata))
mydata = data.frame(values = signif(mydata,3), ID=IDs)
stfdf = STFDF(sp, time, mydata)
as.data.frame(stfdf, row.names = IDs)
unstack(stfdf)
t(unstack(stfdf))
unstack(stfdf, which = 2)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.