vignettes/section_argo.R

In argoFloats: Analysis of Oceanographic Argo Floats

if (!interactive()) png("01_section_argo.png")
library(oce)
library(argoFloats)
oldpar <- par(no.readonly=TRUE)
par(mfrow=c(2,1))
data(section, package="oce")
#getIndex()
ai <- getIndex()
#subset by section
lonlim <- c(-70, -64,-10)
latlim <-c(40,35,35)
index1 <- subset(ai, section=list(longitude=lonlim, latitude=latlim, width=100))
#subset by time
from <- as.POSIXct("2020-09-23", tz="UTC")
to <- as.POSIXct("2020-10-25", tz="UTC")
index2 <- subset(index1, time=list(from=from, to=to))
plot(index2,bathymetry=FALSE, mar=par("mar"),  asp= 1 / cos(mean(range(unlist(index2[["latitude"]]), na.rm=TRUE))*pi/180),  mgp=getOption("oceMgp")
)
points(lonlim, latlim, pch=21, col="black", bg="red", type="o")
plot(section, which="map", mar=par("mar"), col="tan")
par(oldpar)
if (!interactive()) dev.off()