metR (version 0.6.0)

scale_longitude: Helpful scales for maps

Description

These functions are simple wrappers around scale_x_continuous and scale_y_continuous with helpful defaults for plotting longitude, latitude and pressure levels.

Usage

scale_x_longitude(
  name = "",
  ticks = 30,
  breaks = seq(-180, 360, by = ticks),
  expand = c(0, 0),
  labels = LonLabel,
  trans = "identity",
  ...
)
scale_y_longitude(
  name = "",
  ticks = 60,
  breaks = seq(-180, 360, by = ticks),
  expand = c(0, 0),
  labels = LonLabel,
  trans = "identity",
  ...
)
scale_x_latitude(
  name = "",
  ticks = 30,
  breaks = seq(-90, 90, by = ticks),
  expand = c(0, 0),
  labels = LatLabel,
  ...
)
scale_y_latitude(
  name = "",
  ticks = 30,
  breaks = seq(-90, 90, by = ticks),
  expand = c(0, 0),
  labels = LatLabel,
  ...
)
scale_x_level(name = "", expand = c(0, 0), trans = "reverselog", ...)
scale_y_level(name = "", expand = c(0, 0), trans = "reverselog", ...)

Arguments

name

The name of the scale. Used as the axis or legend title. If waiver(), the default, the name of the scale is taken from the first mapping used for that aesthetic. If NULL, the legend title will be omitted.

ticks

spacing between breaks

breaks

One of:

• NULL for no breaks

• waiver() for the default breaks computed by the transformation object

• A numeric vector of positions

• A function that takes the limits as input and returns breaks as output

expand

Vector of range expansion constants used to add some padding around the data, to ensure that they are placed some distance away from the axes. Use the convenience function expand_scale() to generate the values for the expand argument. The defaults are to expand the scale by 5% on each side for continuous variables, and by 0.6 units on each side for discrete variables.

labels

One of:

• NULL for no labels

• waiver() for the default labels computed by the transformation object

• A character vector giving labels (must be same length as breaks)

• A function that takes the breaks as input and returns labels as output

trans

Either the name of a transformation object, or the object itself. Built-in transformations include "asn", "atanh", "boxcox", "date", "exp", "hms", "identity", "log", "log10", "log1p", "log2", "logit", "modulus", "probability", "probit", "pseudo_log", "reciprocal", "reverse", "sqrt" and "time".

A transformation object bundles together a transform, its inverse, and methods for generating breaks and labels. Transformation objects are defined in the scales package, and are called name_trans, e.g. scales::boxcox_trans(). You can create your own transformation with scales::trans_new().

...

Other arguments passed on to scale_(x|y)_continuous()

See Also

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

Examples

# NOT RUN {
data(geopotential)
library(ggplot2)
ggplot(geopotential[date == date[1]], aes(lon, lat, z = gh)) +
    geom_contour() +
    scale_x_longitude() +
    scale_y_latitude()

# }