Odp: Filtering R lists

Hi


r-help-bounces at r-project.org napsal dne 04.03.2009 13:18:30:

  

Hello
I am am new to R and any help with the following would be appreciated:
I have a list (example attached) and I would like to create a new list 
which is a filtered version of this list. I.e I would like a list that 
only contains elements with this value:

Chr 10 : 21853562 - 21855482
    

Lists can have quite complicated structure so here is only a small 
suggestion

lapply(your.list, function(x) x==desired.value)

This shall give you list of logical values if your list has only one 
level. 

Something like

pts <- list(x=mtcars[,1], y=mtcars[,2], z=mtcars[,10])
pts[which(unlist(lapply(pts, function(x) sum(x==4)>0)))]