plot-sealevel-method: Plot a sealevel Object

In oce: Analysis of Oceanographic Data

Plot a sealevel Object

Description

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.

Usage

## S4 method for signature '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,
  grid = TRUE,
  xlim,
  ylim,
  xaxs = "i",
  yaxs = "r",
  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	logical value indicating whether to put a wide margin to the right of time-series plots, matching the space used up by a palette in an imagep() plot.
grid	logical value, indicating whether to draw a grid with grid().
xlim, ylim	optional limits for axes. If not supplied, reasonable choices will be made
xaxs, yaxs	axis-limit parameters, as for standard graphics. The default is to make the time axis extend to the edges of the box, but to make the y axis have some space above and below the range of the data.
debug	a flag that turns on debugging, if it exceeds 0.
...	optional arguments passed to plotting functions.

Value

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.

Author(s)

Dan Kelley

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.

See Also

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, sealevel-class, sealevelTuktoyaktuk, subset,sealevel-method, summary,sealevel-method

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")

oce documentation built on Sept. 11, 2024, 7:09 p.m.