BasicKey

Return various types of breaks and labels for ternary color keys.

internal

Compositional data consisting of three-parts can be color
mapped with a ternary color scale. Such a scale is provided by
the tricolore packages with options for discrete and continuous
colors, mean-centering and scaling. See
Jonas Schöley (2021) "The centered ternary balance scheme. A technique
to visualize surfaces of unbalanced three-part compositions"
<doi:10.4054/DemRes.2021.44.19>,
Jonas Schöley, Frans Willekens (2017) "Visualizing compositional data
on the Lexis surface" <doi:10.4054/DemRes.2017.36.21>, and
Ilya Kashnitsky, Jonas Schöley (2018) "Regional population structures
at a glance" <doi:10.1016/S0140-6736(18)31194-2>.

Jonas Schc3<b6>ley

tricolore

A Flexible Color Scale for Ternary Compositions

Jonas Schöley

Ilya Kashnitsky

BasicKey function

<dl><dt>legend_surface</dt>
<dd>A data frame with numeric 'id', 'p1', 'p2', 'p3' and
character column 'rgb'.</dd>
<dt>limits</dt>
<dd>A 2 by 3 matrix of lower and upper limits for p1, p2 and p3.</dd>
<dt>brklab</dt>
<dd>Breaks and labels as returned by <code>BreaksAndLabels</code>.</dd>
<dt>show_center</dt>
<dd>Should the center be marked on the legend? (logical)</dd>
<dt>center</dt>
<dd>Ternary coordinates of the grey-point.</dd>
<dt>lwd</dt>
<dd>A numeric scalar giving the linewidth of the legend surface
polygons.</dd></dl>

Arguments

Template for Ternary Key — BasicKey

<dl>

<dt>legend_surface</dt>
<dd>A data frame with numeric 'id', 'p1', 'p2', 'p3' and
character column 'rgb'.</dd>


<dt>limits</dt>
<dd>A 2 by 3 matrix of lower and upper limits for p1, p2 and p3.</dd>


<dt>brklab</dt>
<dd>Breaks and labels as returned by <code>BreaksAndLabels</code>.</dd>


<dt>show_center</dt>
<dd>Should the center be marked on the legend? (logical)</dd>


<dt>center</dt>
<dd>Ternary coordinates of the grey-point.</dd>


<dt>lwd</dt>
<dd>A numeric scalar giving the linewidth of the legend surface
polygons.</dd>

</dl>

BasicKey: Template for Ternary Key

Description

Usage

Value

Arguments