longitudinalData (version 2.4.1)

LongData-class: ~ Class: LongData ~

Description

LongData is an objet containing the longitudinal data (the individual trajectories) and some associate value (like time, individual identifiant,...). It can be used either for a single variable-trajectory or for joint variable-trajectories.

Objects from the Class

Object LongData for single variable-trajectory can be created using the fonction longData on a data.frame or on a matrix. LongData for joint trajectories can be created by calling the fonction longData3d on a data.frame or on an array.

Construction

Object LongData for single variable-trajectory can be created by calling the fonction longData on a data.frame or on a matrix. LongData for joint trajectories can be created by calling the fonction longData3d on a data.frame or on an array.

Author

Christophe Genolini 1. UMR U1027, INSERM, Universit� Paul Sabatier / Toulouse III / France 2. CeRSME, EA 2931, UFR STAPS, Universit� de Paris Ouest-Nanterre-La D�fense / Nanterre / France

References

[1] C. Genolini and B. Falissard "KmL: k-means for longitudinal data" Computational Statistics, vol 25(2), pp 317-328, 2010 [2] C. Genolini and B. Falissard "KmL: A package to cluster longitudinal data" Computer Methods and Programs in Biomedicine, 104, pp e112-121, 2011

See Also

Overview: longitudinalData-package Methods: longData, longData3d, imputation, qualityCriterion Plot: plotTrajMeans, plotTrajMeans3d, plot3dPdf

Examples

#################
### building trajectory (longData)
mat <- matrix(c(NA,2,3,4,1,6,2,5,1,3,8,10),4)
ld <- longData(mat,idAll=c("I1","I2","I3","I4"),time=c(2,4,8),varNames="Age")

### '[' and '[<-'
ld["idAll"]
ld["idFewNA"]
ld["varNames"]
ld["traj"]
(ld)

### Plot
plotTrajMeans(ld,parMean=parMEAN(type="n"))