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".balanceCrdsTimes" <- function(crds, dateTime)
{
## Value: list with crds and dateTime input matrices with equal number
## of rows
## --------------------------------------------------------------------
## Arguments: crds=matrix with lon and lat; dateTime=matrix with year,
## month, day, timezone, and dlstime rows, or a POSIXct time
## --------------------------------------------------------------------
ncrds <- nrow(crds)
nTimes <- ifelse(is(dateTime, "POSIXct"), length(dateTime), nrow(dateTime))
if (ncrds == 1 && nTimes > 1) {
crds <- crds[rep(1, nTimes), ]
} else if (ncrds > 1 && nTimes == 1) {
dateTime <- if (is(dateTime, "POSIXct")) {
dateTime[rep(1, ncrds)]
} else dateTime[rep(1, ncrds), ]
} else if (ncrds != nTimes) {
stop("mismatch in number of coordinates and times")
}
list(crds=crds, dateTime=dateTime)
}
###_ crepuscule methods
if (!isGeneric("crepuscule")) {
setGeneric("crepuscule", function(crds, dateTime, ...) {
standardGeneric("crepuscule")
})
}
setMethod("crepuscule",
signature(crds="SpatialPoints", dateTime="POSIXct"),
function(crds, dateTime, solarDep,
direction=c("dawn", "dusk"), POSIXct.out=FALSE) {
if (!isTRUE(!is.projected(crds)))
stop("crds must be geographical coordinates")
if (missing(solarDep)) stop("solarDep must be given")
crdsmtx <- matrix(c(coordinates(crds)[, 1],
coordinates(crds)[, 2]), ncol=2)
eq.ll <- .balanceCrdsTimes(crdsmtx, dateTime)
time.ll <- .timeData(eq.ll$dateTime)
lon <- eq.ll$crds[, 1]
lat <- eq.ll$crds[, 2]
res <- .crepuscule(lon=lon, lat=lat, year=time.ll$year,
month=time.ll$month, day=time.ll$day,
timezone=time.ll$timezone,
dlstime=time.ll$dlstime,
solarDep=solarDep, direction=direction)
if (POSIXct.out) {
secs <- res * 86400
if (is.null(time.ll$tz)) Pct <- as.POSIXct(format(dateTime,
"%Y-%m-%d")) + secs
else Pct <- as.POSIXct(format(dateTime, "%Y-%m-%d"),
tz=time.ll$tz) + secs
res <- data.frame(day_frac=res, time=Pct)
}
res
})
setMethod("crepuscule", signature(crds="matrix", dateTime="POSIXct"),
function(crds, dateTime,
proj4string=CRS("+proj=longlat +datum=WGS84"), solarDep,
direction=c("dawn", "dusk"), POSIXct.out=FALSE) {
crds.sp <- SpatialPoints(crds, proj4string=proj4string)
crepuscule(crds.sp, dateTime=dateTime, solarDep=solarDep,
direction=direction, POSIXct.out=POSIXct.out)
})
###_ sunriset methods
if (!isGeneric("sunriset")) {
setGeneric("sunriset", function(crds, dateTime, ...) {
standardGeneric("sunriset")
})
}
setMethod("sunriset", signature(crds="SpatialPoints", dateTime="POSIXct"),
function(crds, dateTime, direction=c("sunrise", "sunset"),
POSIXct.out=FALSE) {
if (!isTRUE(!is.projected(crds)))
stop("crds must be geographical coordinates")
crdsmtx <- matrix(c(coordinates(crds)[, 1],
coordinates(crds)[, 2]), ncol=2)
eq.ll <- .balanceCrdsTimes(crdsmtx, dateTime)
time.ll <- .timeData(eq.ll$dateTime)
lon <- eq.ll$crds[, 1]
lat <- eq.ll$crds[, 2]
res <- .sunriset(lon=lon, lat=lat, year=time.ll$year,
month=time.ll$month, day=time.ll$day,
timezone=time.ll$timezone,
dlstime=time.ll$dlstime,
direction=direction)
if (POSIXct.out) {
secs <- res * 86400
if (is.null(time.ll$tz)) Pct <- as.POSIXct(format(dateTime,
"%Y-%m-%d")) + secs
else Pct <- as.POSIXct(format(dateTime, "%Y-%m-%d"),
tz=time.ll$tz) + secs
res <- data.frame(day_frac=res, time=Pct)
}
res
})
setMethod("sunriset", signature(crds="matrix", dateTime="POSIXct"),
function(crds, dateTime,
proj4string=CRS("+proj=longlat +datum=WGS84"),
direction=c("sunrise", "sunset"), POSIXct.out=FALSE) {
crds.sp <- SpatialPoints(crds, proj4string=proj4string)
sunriset(crds.sp, dateTime=dateTime,
direction=direction, POSIXct.out=POSIXct.out)
})
###_ solarnoon methods
if (!isGeneric("solarnoon")) {
setGeneric("solarnoon", function(crds, dateTime, ...) {
standardGeneric("solarnoon")
})
}
setMethod("solarnoon", signature(crds="SpatialPoints", dateTime="POSIXct"),
function(crds, dateTime, POSIXct.out=FALSE) {
if (!isTRUE(!is.projected(crds)))
stop("crds must be geographical coordinates")
crdsmtx <- matrix(c(coordinates(crds)[, 1],
coordinates(crds)[, 2]), ncol=2)
eq.ll <- .balanceCrdsTimes(crdsmtx, dateTime)
time.ll <- .timeData(eq.ll$dateTime)
lon <- eq.ll$crds[, 1]
lat <- eq.ll$crds[, 2]
res <- .solarnoon(lon=lon, lat=lat, year=time.ll$year,
month=time.ll$month, day=time.ll$day,
timezone=time.ll$timezone,
dlstime=time.ll$dlstime)
if (POSIXct.out) {
secs <- res * 86400
if (is.null(time.ll$tz)) Pct <- as.POSIXct(format(dateTime,
"%Y-%m-%d")) + secs
else Pct <- as.POSIXct(format(dateTime, "%Y-%m-%d"),
tz=time.ll$tz) + secs
res <- data.frame(day_frac=res, time=Pct)
}
res
})
setMethod("solarnoon", signature(crds="matrix", dateTime="POSIXct"),
function(crds, dateTime,
proj4string=CRS("+proj=longlat +datum=WGS84"),
POSIXct.out=FALSE) {
crds.sp <- SpatialPoints(crds, proj4string=proj4string)
solarnoon(crds.sp, dateTime=dateTime,
POSIXct.out=POSIXct.out)
})
###_ solarpos methods
if (!isGeneric("solarpos")) {
setGeneric("solarpos", function(crds, dateTime, ...) {
standardGeneric("solarpos")
})
}
setMethod("solarpos", signature(crds="SpatialPoints", dateTime="POSIXct"),
function(crds, dateTime, ...) {
if (!isTRUE(!is.projected(crds)))
stop("crds must be geographical coordinates")
crdsmtx <- matrix(c(coordinates(crds)[, 1],
coordinates(crds)[, 2]), ncol=2)
eq.ll <- .balanceCrdsTimes(crdsmtx, dateTime)
time.ll <- .timeData(eq.ll$dateTime)
lon <- eq.ll$crds[, 1]
lat <- eq.ll$crds[, 2]
res <- .solarpos(lon=lon, lat=lat, year=time.ll$year,
month=time.ll$month, day=time.ll$day,
hours=time.ll$hour, minutes=time.ll$min,
seconds=time.ll$sec, timezone=time.ll$timezone,
dlstime=time.ll$dlstime)
matrix(c(azimuth=res[,1], elevation=res[,2]), ncol=2)
})
setMethod("solarpos", signature(crds="matrix", dateTime="POSIXct"),
function(crds, dateTime,
proj4string=CRS("+proj=longlat +datum=WGS84"), ...) {
crds.sp <- SpatialPoints(crds, proj4string=proj4string)
solarpos(crds.sp, dateTime=dateTime)
})
###_* Emacs local variables.
## Local variables:
## allout-widgets-mode-inhibit: t
## allout-layout: (-2 : 0)
## End:
|
