R Graphical Manual

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Last data update: 2014.03.03

R: Control Charts

ss.cc

R Documentation

Control Charts

Description

Plot control charts

Usage

ss.cc(type, data, cdata, CTQ = names(data)[1], groups, climits, nsigmas = 3)

Arguments

`type`	Type of chart (see details)
`data`	data.frame with the process data.
`cdata`	Vector with the controlled process data to compute limits.
`CTQ`	Name of the column in the data.frame containing the CTQ.
`groups`	Name of the column in the data.frame containing the groups.
`climits`	Limits of the controlled process. It should contain three ordered values: lower limit, center line and upper limit.
`nsigmas`	Number of sigmas to compute the limits from the center line (default is 3)

Details

If control limits are provided, cdata is dismissed and a message is shown. If there are no control limits nor controlled data, the limits are computed using data.
Supported types of control charts:

mrMoving Range

Value

A plot with the control chart, and a list with the following elements:

`LCL`	Lower Control Limit
`CL`	Center Line
`UCL`	Upper Control Limit
`phase`	II when cdata or climits are provided. I otherwise.
`out`	Out of control points

Note

We have created this function since the qAnalyst package has been removed from CRAN, and it was used in the "Six Sigma with R" book to plot moving average control charts.

Author(s)

EL Cano

References

Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andres. 2012. Six Sigma with R. Statistical Engineering for Process Improvement, Use R!, vol. 36. Springer, New York. http://www.springer.com/statistics/book/978-1-4614-3651-5.

Examples

ss.cc("mr", ss.data.pb1, CTQ = "pb.humidity")
testout <- ss.data.pb1
testout[31,] <- list(31,17)
ss.cc("mr", testout, CTQ = "pb.humidity")

Results


R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(SixSigma)
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/SixSigma/ss.cc.Rd_%03d_medium.png", width=480, height=480)
> ### Name: ss.cc
> ### Title: Control Charts
> ### Aliases: ss.cc
> 
> ### ** Examples
> 
> ss.cc("mr", ss.data.pb1, CTQ = "pb.humidity")
Phase I limits:
     LCL       CL      UCL 
0.000000 1.569483 5.126767 

Out of control Moving Range:
None
> testout <- ss.data.pb1
> testout[31,] <- list(31,17)
> ss.cc("mr", testout, CTQ = "pb.humidity")
Phase I limits:
     LCL       CL      UCL 
0.000000 1.728600 5.646528 

Out of control Moving Range:
[1] 30
> 
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>