Updating xpose4 stratification headers in VPCs

Dear all, I realise that xpose4 is perceived as getting a bit old, but as far as I can tell it is still very widely used in the community, and auto-generated R-code from PsN still uses xpose4. My own hesitation has always been in the perceived lack of options to customise the output, but it has so many handy features 😊. Currently I'm running VPCs with multi-level stratification implemented using the STRT variable in NONMEM code, and my resulting VPCs have 4 graphs. However, the headings of these graphs are the pretty ugly "STRT==0.5", "STRT==101" etc. Is there a way to change this to a nice factor with customisable layout? And while we're at it: is there a way to access/extract the individual graphs so these can be formatted and/or printed separately? Thanks very much in advance! Kind regards, Rik xpose4::xpose.VPC(pc.info='vpc_results.csv', vpctab='vpctab008',#xlim=c(0,42), PI='lines',type='n',PI.identify.outliers=FALSE,#by='STRT', PI.x.median=TRUE, PI.ci.area.smooth=TRUE, PI.rug=FALSE, PI.ci.up.arcol="dodgerblue", PI.ci.down.arcol="dodgerblue", PI.real.med.col="brown", PI.real.up.col="brown", PI.real.down.col="brown",col="brown", main="VPC final model",ylb="Drug X (ng/mL)",xlb="Time (h)",ylim=c(0.01,120),logy=TRUE, scales = list(x = list(at = seq(0,36,3)))) Rik Schoemaker, PhD Occams Coöperatie U.A. Malandolaan 10 1187 HE Amstelveen The Netherlands http://www.occams.com +31 20 441 6410 [email protected]<mailto:[email protected]> [cid:[email protected]]