point.type

This will be used for the pch parameter of the plots, default is 21.
Set before calling nca_output
&gt; point.type &lt;- 22
See <a href="http://www.statmethods.net/advgraphs/images/points.png">
http://www.statmethods.net/advgraphs/images/points.png</a> for more symbols

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

point.type function

This will be used for the pch parameter of the plots, default is 21.
Set before calling nca_output
&gt; point.type &lt;- 22
See <a href='http://www.statmethods.net/advgraphs/images/points.png'>
http://www.statmethods.net/advgraphs/images/points.png</a> for more symbols

point.type: parameter defining the plotting symbol in the plots

Description

Arguments