In ggmtech/ggQC: Quality Control Charts for 'ggplot'

ggQC version 0.0.31

Bugs Fixed

• a bug associated with drawing the 1n2 sigma lines on the QC charts.
• a strange ggplot bug around the word color and colour effecting violation plots.

ggQC Version 0.0.3

New functions

• stat_QC_Capability() : NEW ggplot stat function to add QC lines, labels, and capability summaries to histograms and density charts (convenience function)

• QC_Capability() : NEW function to calculated capability parameters given LSL, USL, and a data.frame containing the process data.

• capability.summary() : NEW function to calculate capability parameters if the LSL, USL, process mean and sigma from QC charting are already known.

• stat_QC_cap_hlabels(): NEW ggplot stat function to add horizontal QC capability labels to histograms and density charts

• stat_QC_cap_vlabels() : NEW ggplot stat function to add vertical QC capability labels to histograms and density charts

• stat_QC_cap_hlines() : NEW ggplot stat function to add horizontal QC capability lines to histograms and density charts

• stat_QC_cap_vlines() : NEW ggplot stat function to add vertical QC capability lines to histograms and density charts

• stat_QC_cap_summary() : NEW ggplot stat function to display QC capability parameters on a chart.

Updated Functions

• QC_Violations(show.facets=c(1:4)): Use new parameter show.facets to display specific QC violation facet(s).

• stat_QC() : New auto labeling capabilities, simplified ggplot syntax for making mR and xBar style plots; can now display 1 and 2 sigma lines, and accommodate upper and lower physical limits.

ggQC Version 0.0.2

New Functions

• QC_Violations(): NEW function that calculates QC violations for Shewart Quality Control Charts.

• stat_qc_violations(): NEW ggplot stat function to graphically view QC violations in a data set.

Updated Functions

• QC_Lines(): Updated function output to include the calculated sigma value.

Resolved Issues

• Fixed (#32): Observed that when n > 100 I got a convergence error for D5. Unfortunately this causes problems with all the quality control charts if n > 100.

ggQC Version 0.0.1

New Functions

• QC_Lines() : Output quality control chart data in table format
• stat_QC() : ggplot stat to generate control charts supported methods
• stat_mR(): ggplot stat to generate mR chart.
• stat_QC_labels(): ggplot stat to write text labels on control chart center line and limits.
• 30 plus functions to calculate specific control chart constants. (recommend using QC_Lines())

ggmtech/ggQC documentation built on Dec. 20, 2021, 10:43 a.m.