Pchart: SPC P-chart

In SSDforR: Functions to Analyze Single System Data

SPC P-chart

Description

This function builds a P-chart and can be used when the target behavior has a binary outcome. This chart allows for a comparison of the proportion of tasks completed over time or between phases. A space separates each phase.

Usage

Pchart(behavior, groupX, bandX, ABxlab, ABylab, ABmain)

Arguments

behavior	behavior variable
groupX	grouping variable
bandX	number of standard deviations desired (e.g., 2)
ABxlab	label for x-axis between quotation marks (e.g., "weeks")
ABylab	label for y-axis between quotation marks (e.g., "attendance"")
ABmain	main title for chart between quotation marks (e.g., "Attendance Over Time")

Author(s)

Charles Auerbach, PhD Wurzweiler School of Social Work Wendy Zeitlin, PhD Montclair State University

References

Auerbach, Charles, and Zeitlin Wendy. SSD for R: An R Package for Analyzing Single-Subject Data. Oxford University Press, 2014. p75, p139-140

Orme, J. & Cox, M.E. (2001). Analyzing single-subject design data using statistical proces control charts. Social Work Research, 25(2), 115-127.

Go to www.ssdanalysis.com for more information.

Examples

attend<-c(0,0,0,1,0,0,1,0,0,1,0,0,1,0,1,0,0,0,0,0,1,1,0,0,1,NA,
0,1,1,0,1,1,0,1,1,1,0,1,0,0,1,1,1,1,0,0,1,1,0,1,0,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1)

day<-c(1,1,1,1,1,2,2,2,2,2,3,3,3,3,3,4,4,4,4,4,5,5,5,5,5,NA,6,6,
6,6,6,7,7,7,7,7,
8,8,8,8,8,9,9,9,9,9,10,10,10,10,10,11,11,11,11,
11,12,12,12,12,12,13,
13,13,13,13,14,14,14,14,14,15,15,15,15,15)
Pchart(attend, day, 2, "week", "amount", "Group attendance")

SSDforR documentation built on Nov. 24, 2023, 5:08 p.m.