statsSpcFun {qAnalyst}R Documentation

Internal function to calculate control chart general statistics

Description

statsSpcFun receives data and desidered chart informations. StatsFun returns a list whose elements are general and chart - specific statistics.

Usage

statsSpcFun(x, sg, type = type)

Arguments

x data vector.
sg subgroups id, as specified in spc
type chart type.

Details

The type of chart is compulsory.

Value

A list with the following items:

numTot total number of elements in x.
numNNmissing total number of non - missing elements in x.
numMissing total number of missing elements in x.
nGroupsX total number of groups in x.
meanX mean of x.
minX min of x.
maxX max of x.
sdTotX total standard deviation of x.
sdWithinX sd within of x.
sdBetweenX sd between of x.
meanRangeX mean range of x.

Note

Return a list used by spc.

Author(s)

Giorgio Spedicato

References

Internal function

See Also

spc, print.spc

Examples

#simple example
set.seed(100)
x=c(rnorm(30,m=10,s=1), rnorm(30,m=12,s=1), rnorm(30,m=10,s=4))
sg=sort(rep(1:30,3))
statsList=statsSpcFun(x=x, sg=sg, type = "xbar")
str(statsList)

[Package qAnalyst version 0.6.0 Index]