stat_hline

The aesthetic mapping, usually constructed
  with <code><a href="/link/aes?package=ggplot2&version=0.9.1" rd-options="" data-mini-rdoc="ggplot2::aes">aes</a></code> or <code><a href="/link/aes_string?package=ggplot2&version=0.9.1" rd-options="" data-mini-rdoc="ggplot2::aes_string">aes_string</a></code>. Only
  needs to be set at the layer level if you are overriding
  the plot defaults.

mapping

A layer specific dataset - only needed if you
  want to override the plot defaults.

data

The geometric object to use display the data

geom

The position adjustment to use for
  overlappling points on this layer

position

other arguments passed on to
  <code><a href="/link/layer?package=ggplot2&version=0.9.1" rd-options="" data-mini-rdoc="ggplot2::layer">layer</a></code>. This can include aesthetics whose
  values you want to set, not map. See <code><a href="/link/layer?package=ggplot2&version=0.9.1" rd-options="" data-mini-rdoc="ggplot2::layer">layer</a></code>
  for more details.

internal

An implementation of the grammar of graphics in R. It
        combines the advantages of both base and lattice graphics:
        conditioning and shared axes are handled automatically, and you
        can still build up a plot step by step from multiple data
        sources. It also implements a sophisticated multidimensional
        conditioning system and a consistent interface to map data to
        aesthetic attributes. See the ggplot2 website for more
        information, documentation and examples.

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stat_hline: Add a horizontal line

Description

Usage

Arguments

Examples