mphase1.methods {dfphase1}

Methods for objects of class mphase1

Description

Methods print and plot allow to write to the console and plot (optionally changing the layout) the result of the Phase I analysis performed with function mphase1.

Method postsignal implements the post-signal Phase I analysis based on the adaptive LASSO described in Capizzi and Masarotto (2016). It uses the p-value and the results on the forward search contained in its first argument. Hence, it is useful for re-running the analysis with different values of alpha and/or gamma.

Usage

## S3 method for class 'mphase1'
print(x,...)
## S3 method for class 'mphase1'
plot(x,layout=c(1,p),...)
## S3 method for class 'mphase1'
postsignal(x, plot = TRUE, alpha = 0.05, gamma = 0.5,...)

Arguments

x

an object returned by function mphase1.

layout

an integer vector describing the multi-panel (and possible multi-page) layout.

plot

logical; if TRUE the diagnostic plot is displayed.

alpha

real; the acceptable false alarm probability; if the observed p-value is greater than alpha, then the estimated mean function is a constant.

gamma

real; the extra penalization for the extended BIC criteria.

...

ignored.

Value

An object of class mphase1. See mphase1 for the description.

Author(s)

Giovanna Capizzi and Guido Masarotto.

References

G. Capizzi and G. Masarotto (2017), Phase I Distribution-Free Analysis of Multivariate Data, Technometrics, 59, pp. 484–495, doi:10.1080/00401706.2016.1272494.

Examples

  data(gravel)
  u <- mphase1(gravel,plot=FALSE)
  print(u)
  plot(u,layout=c(2,1))
  postsignal(u,plot=FALSE,gamma=1)