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news.Rmd
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---
output: github_document
---
#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())