mvdalab (version 1.7)

T2: Generates a Hotelling's T2 Graph

Description

Generates a Hotelling's T2 Graph both mvdareg and mvdapca objects.

Usage

T2(object, ncomp = object$ncomp, phase = 1, conf = c(.95, .99), verbose = FALSE)

Value

The output of T2 is a graph of Hotelling's T2 and a data frame listing the T2 values.

Arguments

object

an object of class mvdareg or mvdapca.

ncomp

the number of components to include in the calculation of Hotelling's T2.

phase

designates whether the confidence limits should reflect the current data frame, phase = 1 or future observations, phase = 2.

conf

the confidence level(s) to use for upper control limit.

verbose

output results as a data frame

Author

Nelson Lee Afanador ()

Details

T2 is used to generates a Hotelling's T2 graph both PLS and PCA models.

References

Hotelling, H. (1931). "The generalization of Student's ratio". Annals of Mathematical Statistics 2 (3): 360:378.

Examples

data(Penta)
mod1 <- plsFit(log.RAI ~., scale = TRUE, data = Penta[, -1],
               ncomp = 2, validation = "loo")
T2(mod1, ncomp = 2)