import(methods)
import(sp)
import(lattice)
importFrom(stats, aggregate, na.omit, time, start, end, reshape)
importFrom(utils, stack, unstack)
importFrom(xts, xts, as.xts, timeBased)
importFrom(zoo, index, na.locf, na.spline, na.approx, as.zoo)
importFrom(intervals, interval_overlap, Intervals)

exportClasses(
	xts, zoo,
	ST, STF, STFDF,
	STS, STSDF,
	STI, STIDF,
	STT, STTDF,
	ltraj
)

export(delta,
	ST,
	STF, STFDF,
	STS, STSDF,
	STI, STIDF,
	STT, STTDF,
	stConstruct,
	stInteraction,
	read.tgrass,
	write.tgrass,
	eof, EOF,
	nbMult,
	# zoo methods:
	index, na.locf, na.spline, na.approx, as.zoo
)

exportMethods(
	aggregate,
	bbox,
	coordnames,
	geometry,
	over,
	plot,
	stbox,
	stplot,
	timeMatch
)

S3method(aggregate, ST)
S3method(aggregate, STFDF)
S3method(as.array, STFDF)
S3method(as.data.frame, STF)
S3method(as.data.frame, STS)
S3method(as.data.frame, STI)
S3method(as.data.frame, STFDF)
S3method(as.data.frame, STSDF)
S3method(as.data.frame, STIDF)
S3method(as.xts, STIDF)
S3method(cbind, ST)
S3method(dim, ST)
S3method(dim, STF)
S3method(dim, STS)
S3method(dim, STI)
S3method(dim, STT)
S3method(dim, STFDF)
S3method(dim, STSDF)
S3method(dim, STIDF)
S3method(dim, STTDF)
S3method(index, STF)
S3method(index, STS)
S3method(index, STI)
S3method(index, STT)
S3method(index, STFDF)
S3method(index, STSDF)
S3method(index, STIDF)
S3method(index, STTDF)
S3method(length, STF)
S3method(length, STS)
S3method(length, STI)
S3method(length, STT)
S3method(length, STFDF)
S3method(length, STSDF)
S3method(length, STIDF)
S3method(length, STTDF)
S3method(lines, STTDF)
S3method(na.omit, STFDF)
S3method(rbind, STIDF)
S3method(rbind, STSDF)
S3method(rbind, STFDF)
S3method(print, summary.ST)
S3method(stack, STFDF)
S3method(stack, STSDF)
S3method(stack, STIDF)
S3method(unstack, STFDF)

S3method(start, ST)
S3method(end, ST)
S3method(time, ST)
S3method(na.locf, STFDF)
S3method(na.spline, STFDF)
S3method(na.approx, STFDF)
S3method(as.zoo, STFDF)