scale_longitude.Rd

% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/scale_longitude.R
\name{scale_longitude}
\alias{scale_longitude}
\alias{scale_x_longitude}
\alias{scale_latitude}
\alias{scale_y_longitude}
\alias{scale_x_latitude}
\alias{scale_y_latitude}
\alias{scale_x_level}
\alias{scale_y_level}
\title{Helpful scales for maps}
\usage{
scale_x_longitude(
  name = "",
  ticks = 30,
  breaks = seq(-180, 360, by = ticks),
  expand = c(0, 0),
  labels = LonLabel,
  ...
)

scale_y_longitude(
  name = "",
  ticks = 60,
  breaks = seq(-180, 360, by = ticks),
  expand = c(0, 0),
  labels = LonLabel,
  ...
)

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

\item{ticks}{spacing between breaks}

\item{breaks}{One of:
\itemize{
\item \code{NULL} for no breaks
\item \code{waiver()} for the default breaks computed by the
\link[scales:new_transform]{transformation object}
\item A numeric vector of positions
\item A function that takes the limits as input and returns breaks
as output (e.g., a function returned by \code{\link[scales:breaks_extended]{scales::extended_breaks()}}).
Note that for position scales, limits are provided after scale expansion.
Also accepts rlang \link[rlang:as_function]{lambda} function notation.
}}

\item{expand}{For position scales, a 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 \code{\link[ggplot2:expansion]{ggplot2::expansion()}} to generate
the values for the expand argument.}

\item{labels}{One of:
\itemize{
\item \code{NULL} for no labels
\item \code{waiver()} for the default labels computed by the
transformation object
\item A character vector giving labels (must be same length as \code{breaks})
\item An expression vector (must be the same length as breaks). See ?plotmath for details.
\item A function that takes the breaks as input and returns labels
as output. Also accepts rlang \link[rlang:as_function]{lambda} function
notation.
}}

\item{...}{Other arguments passed on to \verb{scale_(x|y)_continuous()}}

\item{trans}{\ifelse{html}{\href{https://lifecycle.r-lib.org/articles/stages.html#deprecated}{\figure{lifecycle-deprecated.svg}{options: alt='[Deprecated]'}}}{\strong{[Deprecated]}} Deprecated in favour of
\code{transform}.}
}
\description{
These functions are simple wrappers around
\code{\link[ggplot2]{scale_x_continuous}} and
\code{\link[ggplot2]{scale_y_continuous}} with
helpful defaults for plotting longitude, latitude and pressure levels.
}
\examples{
data(geopotential)
library(ggplot2)
ggplot(geopotential[date == date[1]], aes(lon, lat, z = gh)) +
    geom_contour() +
    scale_x_longitude() +
    scale_y_latitude()

data(temperature)
ggplot(temperature[lon == lon[1] & lat == lat[1]], aes(air, lev)) +
    geom_path() +
    scale_y_level()

}
\seealso{
Other ggplot2 helpers: 
\code{\link{MakeBreaks}()},
\code{\link{WrapCircular}()},
\code{\link{geom_arrow}()},
\code{\link{geom_contour2}()},
\code{\link{geom_contour_fill}()},
\code{\link{geom_label_contour}()},
\code{\link{geom_relief}()},
\code{\link{geom_streamline}()},
\code{\link{guide_colourstrip}()},
\code{\link{map_labels}},
\code{\link{reverselog_trans}()},
\code{\link{scale_divergent}},
\code{\link{stat_na}()},
\code{\link{stat_subset}()}
}
\concept{ggplot2 helpers}