This ought to work: resultdt <- lapply(PGWide[, 240:389], function(x, ...) try(tdt(x, ...))) You can then check the class of each component to see which one failed. Andy From: Farrel Buchinsky> > "Berton Gunter" <gunter.berton at gene.com> wrote in message > news:008601c67097$de1b46e0$5bc4fea9 at gne.windows.gene.com... > > ?try > > > > as in > > > > result<- try (some R expression...) > > if (inherits(result,'try-error')) ...do something else > ...do something > > else > > No heaven on earth yet. > > how would I incorporate this kind of functionality into > Resultdt<-lapply(PGWide[,240:389], tdt) > > everything would have to be built into the tdt spot in the > above statement. > How does one get the if...else in there? Does one have to do > that as one would program a function or could one write the > if...else right into "Resultdt<-lapply(PGWide[,240:389], tdt)" > > This works > > for (few in c(9,10,11,12,243,20)) if > > (inherits(try(tdt(PGWide[,few])),'try-error')) > print("messed up") else > > print("works") > [1] "works" > [1] "works" > [1] "works" > [1] "works" > Error in rep.default(1, nrow(U)) : rep() incorrect type for > second argument In addition: Warning messages: > 1: 1 misinheritances in: phase.resolve(g.cs, g.mr, g.fr, > as.allele.pair = TRUE, allow.ambiguous = (parent => 2: 2 misinheritances in: phase.resolve(g.cs, g.mr, g.fr, > as.allele.pair = TRUE, allow.ambiguous = (parent => 3: 2 misinheritances in: phase.resolve(g.cs, g.mr, g.fr, > as.allele.pair = TRUE, allow.ambiguous = (parent => 4: 4 misinheritances in: phase.resolve(g.cs, g.mr, g.fr, > as.allele.pair = TRUE, allow.ambiguous = (parent == [1] "messed up" > [1] "works" > Warning message: > 1 misinheritances in: phase.resolve(g.cs, g.mr, g.fr, > as.allele.pair = TRUE, allow.ambiguous = (parent => > BUT THIS DOES NOT > > lapply(PGWide[,c(9,10,11,12,,243,20)], if > (inherits(try(tdt),'try-error') print("messed up") else > print("works")) > Error: syntax error in "lapply(PGWide[,c(9,10,11,12,,243,20)], if > (inherits(try(tdt),'try-error') print" > > Any idea why...can it be that one cannot have multiple > commands on one line > > p=7 f=8 > Error: syntax error in "p=7 f" > > in the lapply, how would R know that I was sending the list to tdt? > > > -- > Farrel Buchinsky, MD > Pediatric Otolaryngologist > Allegheny General Hospital > Pittsburgh, PA > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > >