oce (version 0.1-82)

section.sort: Sort a section

Description

Sort a section

Usage

section.sort(section, by=c("station.id", "distance"))

Arguments

section

a section object containing the section to be gridded.

by

a string indicating how to reorder. Note that the "distance" method does not yet work ... also, eventually there will be other possibilities, e.g. "latitude".

Value

• An object of class "section" that has less lateral variation than the input section.

Details

Sections created with make.section have "stations" that are in the order of the CTD objects (or filenames for such objects) provided. Sometimes, this is not the desired order, e.g. if file names discovered with dir are in an order that makes no sense. (For example, a practioner might name stations "stn1", "stn2", etc., not realizing that this will yield an unhelpful ordering, by file name, if there are more than 9 stations.)

The purpose of section.sort is to permit reordering the constituent stations in sensible ways.

See Also

Sections are normally created with read.section or make.section. subset may be used to create a new section consisting of just a subset of an existing station, e.g. to focus on a particular region.

Examples

# Eastern North Atlantic, showing Mediterranean water. 
library(oce)
data(coastline.world)
data(a03)
s <- section.grid(subset(a03, indices=90:3), p=seq(00, 2500, 100))
ss <- section.sort(s, by="station.id")
plot(ss,coastline=coastline.world,map.xlim=c(-75,0))