coord_rect

coord_square

Geometric data analysis often requires that coordinates lie on
the same scale. The coordinate system <code>CoordRect</code>, alias <code>CoordSquare</code>,
provides control of both coordinate and window aspect ratios.

A variety of multivariable data summary statistics and
constructions have been proposed, either to generalize univariable analogs
or to exploit multivariable properties.
Notable among these are the bivariate peelings surveyed by Green
(1981, ISBN:978-0-471-28039-2),
the bag-and-bolster plots proposed by Rousseeuw &al (1999)
<doi:10.1080/00031305.1999.10474494>, and the minimum spanning trees used by
Jolliffe (2002) <doi:10.1007/b98835> to represent high-dimensional
relationships among data in a low-dimensional plot.
Additionally, biplots of singular value--decomposed tabular data, such as
from principal components analysis, make use of vectors, calibrated axes,
and other representations of variable elements to complement point markers
for case elements; see Gabriel (1971) <doi:10.1093/biomet/58.3.453> and
Gower & Harding (1988) <doi:10.1093/biomet/75.3.445> for original proposals.
Because they treat the abscissa and ordinate as commensurate or the data
elements themselves as point masses or unit vectors, these multivariable
tools can be thought of as belonging to geometric data analysis; see Podani
(2000, ISBN:90-5782-067-6) for techniques and applications and Le Roux &
Rouanet (2005) <doi:10.1007/1-4020-2236-0> for foundations. 'gggda' extends
Wickham's (2010) <doi:10.1198/jcgs.2009.07098> layered grammar of graphics
with statistical transformation ("stat") and geometric construction ("geom")
layers for many of these tools, as well as convenience coordinate systems
to emphasize intrinsic geometry of the data.

Jason Cory Brunson

gggda

A 'ggplot2' Extension for Geometric Data Analysis

Emily Paul

John Gracey

coord_rect function

<dl><dt>ratio</dt>
<dd>aspect ratio, expressed as <code>y / x</code></dd>
<dt>window_ratio</dt>
<dd>aspect ratio of plotting window</dd>
<dt>xlim, ylim</dt>
<dd>Limits for the x and y axes.</dd>
<dt>expand</dt>
<dd>If <code>TRUE</code>, the default, adds a small expansion factor to
the limits to ensure that data and axes don't overlap. If <code>FALSE</code>,
limits are taken exactly from the data or <code>xlim</code>/<code>ylim</code>.</dd>
<dt>clip</dt>
<dd>Should drawing be clipped to the extent of the plot panel? A
setting of <code>"on"</code> (the default) means yes, and a setting of <code>"off"</code>
means no. In most cases, the default of <code>"on"</code> should not be changed,
as setting <code>clip = "off"</code> can cause unexpected results. It allows
drawing of data points anywhere on the plot, including in the plot margins. If
limits are set via <code>xlim</code> and <code>ylim</code> and some data points fall outside those
limits, then those data points may show up in places such as the axes, the
legend, the plot title, or the plot margins.</dd></dl>

Arguments

Cartesian coordinates and plotting window with fixed aspect ratios — coord_rect

<dl>

<dt>ratio</dt>
<dd>aspect ratio, expressed as <code>y / x</code></dd>


<dt>window_ratio</dt>
<dd>aspect ratio of plotting window</dd>


<dt>xlim, ylim</dt>
<dd>Limits for the x and y axes.</dd>


<dt>expand</dt>
<dd>If <code>TRUE</code>, the default, adds a small expansion factor to
the limits to ensure that data and axes don't overlap. If <code>FALSE</code>,
limits are taken exactly from the data or <code>xlim</code>/<code>ylim</code>.</dd>


<dt>clip</dt>
<dd>Should drawing be clipped to the extent of the plot panel? A
setting of <code>"on"</code> (the default) means yes, and a setting of <code>"off"</code>
means no. In most cases, the default of <code>"on"</code> should not be changed,
as setting <code>clip = "off"</code> can cause unexpected results. It allows
drawing of data points anywhere on the plot, including in the plot margins. If
limits are set via <code>xlim</code> and <code>ylim</code> and some data points fall outside those
limits, then those data points may show up in places such as the axes, the
legend, the plot title, or the plot margins.</dd>

</dl>

coord_rect: Cartesian coordinates and plotting window with fixed aspect ratios

Description

Usage

Value

Arguments

Examples