line.colors

Set before calling nca_output
&gt; line.colors['ce_fdh'] &lt;- 'blue'
Reset one line color by setting it to NULL
&gt; line.colors['ce_fdh'] &lt;- NULL
Reset all line colors by setting line.colors to NULL
&gt; line.colors &lt;- NULL

Parameter

Performs a Necessary Condition Analysis (NCA). (Dul, J. 2016. Necessary Condition Analysis (NCA). ''Logic and Methodology of 'Necessary but not Sufficient' causality." Organizational Research Methods 19(1), 10-52,
<http://journals.sagepub.com/doi/abs/10.1177/1094428115584005>).
NCA identifies necessary (but not sufficient) conditions in datasets, where x causes (e.g. precedes) y. Instead of drawing a regression line ''through the middle of the data'' in an xy-plot, NCA draws the ceiling line. The ceiling line y = f(x) separates the area with observations from the area without observations.
(Nearly) all observations are below the ceiling line: y <= f(x). The empty zone is in the upper left hand corner of the xy-plot (with the convention that the x-axis is ''horizontal'' and the y-axis is ''vertical'' and that values increase ''upwards'' and ''to the right''). The ceiling line is a (piecewise) linear non-decreasing line: a linear step function or a straight line. It indicates which level of x (e.g. an effort or input) is necessary but not sufficient for a (desired) level of y (e.g. good performance or output). A quick start guide for using this package can be found here: <http://repub.eur.nl/pub/78323/> or <https://ssrn.com/abstract=2624981>.

Govert Buijs

Necessary Condition Analysis

line.colors function

This is a list with line colors for each ceiling technique<table><tr><td>
</td>
<td> ols </td>
<td> 'green' </td>
<td> lh </td>
<td> 'red3'</td>
</tr><tr><td>
</td>
<td> cols </td>
<td> 'darkgreen' </td>
<td> qr </td>
<td> 'blue'</td>
</tr><tr><td>
</td>
<td> ce_vrs </td>
<td> 'orchid4' </td>
<td> cr_vrs </td>
<td> 'violet'</td>
</tr><tr><td>
</td>
<td> ce_fdh </td>
<td> 'red' </td>
<td> cr_fdh </td>
<td> 'orange'</td>
</tr></table>

line.colors: a set defining the line colors for the plots

Description

Arguments

Format

ols	'green'	lh	'red3'
cols	'darkgreen'	qr	'blue'
ce_vrs	'orchid4'	cr_vrs	'violet'
ce_fdh	'red'	cr_fdh	'orange'