[R] Spline curve

I wish to fit spline curves to longitudinal data Which package should I use and how should data be structured to facilitate the analysis - Deva __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listin

[R] Lavaan

Dear Senior users of R/R Studio, I am very new to this environment hence am unable to plot the SEM models including use of graphic package ggplot. Request for some help in getting the plots please. Thanks, - Deva __ R-help@r-project.org mailing l