Creates a plot for a sea-level dataset, in one of two varieties. Depending on the length of which, either a single-panel or multi-panel plot is drawn. If there is just one panel, then the value of par used in plot,sealevel-method is retained upon exit, making it convenient to add to the plot. For multi-panel plots, par is returned to the value it had before the call.

# S4 method for sealevel
plot(
x,
which = 1:3,
drawTimeRange = getOption("oceDrawTimeRange"),
mgp = getOption("oceMgp"),
mar = c(mgp[1] + 0.5, mgp[1] + 1.5, mgp[2] + 1, mgp[2] + 3/4),
marginsAsImage = FALSE,
debug = getOption("oceDebug"),
...
)

## Arguments

x

a sealevel object.

which

a numerical or string vector indicating desired plot types, with possibilities 1 or "all" for a time-series of all the elevations, 2 or "month" for a time-series of just the first month, 3 or "spectrum" for a power spectrum (truncated to frequencies below 0.1 cycles per hour, or 4 or "cumulativespectrum" for a cumulative integral of the power spectrum.

drawTimeRange

boolean that applies to panels with time as the horizontal axis, indicating whether to draw the time range in the top-left margin of the plot.

mgp

3-element numerical vector to use for par("mgp"), and also for par("mar"), computed from this. The default is tighter than the R default, in order to use more space for the data and less for the axes.

mar

value to be used with par("mar").

marginsAsImage

boolean, TRUE to put a wide margin to the right of time-series plots, matching the space used up by a palette in an imagep() plot.

debug

a flag that turns on debugging, if it exceeds 0.

...

optional arguments passed to plotting functions.

None.

## Historical Note

Until 2020-02-06, sea-level plots had the mean value removed, and indicated with a tick mark and margin note on the right-hand side of the plot. This behaviour was confusing. The change did not go through the usual deprecation process, because the margin-note behaviour had not been documented.

## References

The example refers to Hurricane Juan, which caused a great deal of damage to Halifax in 2003. Since this was in the era of the digital photo, a casual web search will uncover some spectacular images of damage, from both wind and storm surge. Landfall, within 30km of this sealevel gauge, was between 00:10 and 00:20 Halifax local time on Monday, Sept 29, 2003.

The documentation for the sealevel class explains the structure of sealevel objects, and also outlines the other functions dealing with them.

Other functions that plot oce data: download.amsr(), plot,adp-method, plot,adv-method, plot,amsr-method, plot,argo-method, plot,bremen-method, plot,cm-method, plot,coastline-method, plot,ctd-method, plot,gps-method, plot,ladp-method, plot,landsat-method, plot,lisst-method, plot,lobo-method, plot,met-method, plot,odf-method, plot,rsk-method, plot,satellite-method, plot,section-method, plot,tidem-method, plot,topo-method, plot,windrose-method, plot,xbt-method, plotProfile(), plotScan(), plotTS(), tidem-class

Other things related to sealevel data: [[,sealevel-method, [[<-,sealevel-method, as.sealevel(), read.sealevel(), sealevel-class, sealevelTuktoyaktuk, sealevel, subset,sealevel-method, summary,sealevel-method

Dan Kelley

## Examples

library(oce)
data(sealevel)
## local Halifax time is UTC + 4h
juan <- as.POSIXct("2003-09-29 00:15:00", tz="UTC")+4*3600
plot(sealevel, which=1, xlim=juan+86400*c(-7, 7))
abline(v=juan, col='red')