plotresprm: Plot residuals from repeated DCV of PRM

In chemometrics: Multivariate Statistical Analysis in Chemometrics

Plot residuals from repeated DCV of PRM

Description

Generate plot showing residuals for Repeated Double Cross Validation for Partial Robust M-regression

Usage

plotresprm(prmdcvobj, optcomp, y, X, ...)

Arguments

prmdcvobj	object from repeated double-CV of PRM, see prm_dcv
optcomp	optimal number of components
y	data from response variable
X	data with explanatory variables
...	additional plot arguments

Details

After running repeated double-CV for PRM, this plot visualizes the residuals. The result is compared with predicted values obtained via usual CV of PRM.

Value

A plot is generated.

Author(s)

Peter Filzmoser <[e-mail]>

References

K. Varmuza and P. Filzmoser: Introduction to Multivariate Statistical Analysis in Chemometrics. CRC Press, Boca Raton, FL, 2009.

See Also

prm

Examples

data(NIR)
X <- NIR$xNIR[1:30,]      # first 30 observations - for illustration
y <- NIR$yGlcEtOH[1:30,1] # only variable Glucose
NIR.Glc <- data.frame(X=X, y=y)
res <- prm_dcv(X,y,a=4,repl=2)
plot4 <- plotresprm(res,opt=res$afinal,y,X)

chemometrics documentation built on Aug. 25, 2023, 5:18 p.m.