XMRs combine X-Bar control charts and Moving Range control charts. These functions also will recalculate the reference lines when significant change has occurred.
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.
For the development version:
For the official CRAN version:
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)
For information about errors and problems, check the [problems and solutions file.](file:///Q:/StrategicResearch/Rules%20and%20Procedures%20Folder/Checklists%20and%20procedures/Procedure%20Manual/Data%20Analysis/Pages/issues.html#xmrr)
NEWS.mdfile to track changes to the package.