X-bar and R control charts

This function builds the X-bar and R control charts in the same window.

cchart.Xbar_R(x, sizes)

Arguments

x

The data to be plotted.

sizes

A value or a vector of values specifying the sample sizes associated with each group.

Value

Return the two control charts.

Author

Daniela R. Recchia, Emanuel P. Barbosa.

Examples

data(pistonrings)
attach(pistonrings)
#> The following objects are masked from pistonrings (pos = 3):
#> 
#>     V1, V2, V3, V4, V5
cchart.Xbar_R(pistonrings[1:25, ], 5)


#> List of 11
#>  $ call      : language qcc(data = x, type = "R", add.stats = FALSE)
#>  $ type      : chr "R"
#>  $ data.name : chr "x"
#>  $ data      : num [1:25, 1:5] 74 74 74 74 74 ...
#>   ..- attr(*, "dimnames")=List of 2
#>  $ statistics: Named num [1:25] 0.038 0.019 0.036 0.022 0.026 ...
#>   ..- attr(*, "names")= chr [1:25] "1" "2" "3" "4" ...
#>  $ sizes     : Named int [1:25] 5 5 5 5 5 5 5 5 5 5 ...
#>   ..- attr(*, "names")= chr [1:25] "1" "2" "3" "4" ...
#>  $ center    : num 0.0228
#>  $ std.dev   : num 0.00979
#>  $ nsigmas   : num 3
#>  $ limits    : num [1, 1:2] 0 0.0481
#>   ..- attr(*, "dimnames")=List of 2
#>  $ violations:List of 2
#>  - attr(*, "class")= chr "qcc"