It creates an object of class 'npqcd' to perform statistical quality control. This object is used to plot Non Parametric Multivariate Control Charts.
Arguments
- x
A matrix, a data-frame or an array which it should contain data. Dimension has to be the same as that of the observations.
- G
The x as a matrix, data frame or list. If it is a matrix or data frame, then each row is viewed as one multivariate observation.
- data.name
A string that specifies the title displayed on the plots. If not provided it is taken from the name of the object
x.
Examples
library(qcr)
set.seed(356)
data <- matrix(rnorm(999), nc = 3)
x <-rexp(999,0.5)
x <-matrix(x,ncol=3)
data.npqcd <- npqcd(data,x)
str(data.npqcd)
#> List of 2
#> $ x: num [1:333, 1:3, 1] 0.306 -1.179 -0.322 -0.258 1.389 ...
#> $ G: num [1:333, 1:3] 1.75 1.47 5.4 0.97 1.55 ...
#> - attr(*, "data.name")= chr "DATA"
#> - attr(*, "type.data")= chr "Multivariate"
#> - attr(*, "class")= chr [1:2] "npqcd" "list"