I tried following commands: amp~time|subject/trial #this was the grouping structure of the data
plot(dip,inner=~condition,layout=c(2,2)) after the plot command I obtained this error message: Error in if(!any(cond.max.level - cond.current.level <0)&&(row-1)* : missing value where TRUE/FALSE needed This error only occured in compination with "layout". It was no problem to plot all subjects on one page. Further, this error did not occur using older version of R (1.8 or 1.7). Did somebody encounter similar problems ? Stephan Moratti -- Dipl. Psych. Stephan Moratti Dept. of Psychology University of Konstanz P.O. Box D25 D-78457 Konstanz, Germany Tel.: +49 (0) 7531 882385 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html