WrapCircular: Wrap periodic data to any range

In metR: Tools for Easier Analysis of Meteorological Fields

Wrap periodic data to any range

Description

Periodic data can be defined only in one period and be extended to any arbitrary range.

Usage

WrapCircular(x, circular = "lon", wrap = c(0, 360))

Arguments

x	a data.frame
circular	the name of the circular dimension
wrap	the wrap for the data to be extended to

Value

A data.frame.

See Also

geom_contour2

Other ggplot2 helpers: MakeBreaks(), geom_arrow(), geom_contour2(), geom_contour_fill(), geom_label_contour(), geom_relief(), geom_streamline(), guide_colourstrip(), map_labels, reverselog_trans(), scale_divergent, scale_longitude, stat_na(), stat_subset()

Examples

library(ggplot2)
library(data.table)
data(geopotential)
g <- ggplot(geopotential[date == date[1]], aes(lon, lat)) +
    geom_contour(aes(z = gh)) +
    coord_polar() +
    ylim(c(-90, -10))

# This plot has problems in lon = 0
g

# But using WrapCircular solves it.
g %+% WrapCircular(geopotential[date == date[1]], "lon", c(0, 360))

# Aditionally data can be just repeatet to the right and
# left
ggplot(WrapCircular(geopotential[date == date[1]], wrap = c(-180, 360 + 180)),
       aes(lon, lat)) +
    geom_contour(aes(z = gh))

# The same behaviour is now implemented directly in geom_contour2
# and geom_contour_fill
ggplot(geopotential[date == date[1]], aes(lon, lat)) +
    geom_contour2(aes(z = gh), xwrap = c(-180, 360 + 180))

metR documentation built on Oct. 14, 2024, 5:09 p.m.