Description
Generate XMR Control Chart Data from Time-Series Data.
Description
XMRs combine X-Bar control charts and Moving Range control charts. These functions also will recalculate the reference lines when significant change has occurred.
README.md
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)