Generate XMR Control Chart Data from Time-Series Data

XMRs combine X-Bar control charts and Moving Range control charts. These functions also will recalculate the reference lines when significant change has occurred.

Overview

xmrr is a package designed to generate and visualize control charts from time-series data.

• xmr(): Generates XMR data.

• xmr_chart(): Takes the output from xmr() and makes an XMR chart.

Installation

For the development version:

devtools::install_github("zanidean/xmrr")

For the official CRAN version:

install.packages("xmrr")

Usage

XMRS have two key asssumptions:

• Measurements of value happen over sequential time.

• Each unit of time has only one measurement of value.

This snippet shows the basic syntax:

Year <- seq(2001, 2009, 1)
Measure <-  runif(length(Year))

df <- data.frame(Year, Measure)

xmr(df, "Measure", recalc = T)