[R] Re RGui and object browser

Petr Pikal petr.pikal at precheza.cz
Fri Jul 19 09:19:30 CEST 2002

Hallo Dan

I used your code for ls.objects and it is very usefull. I corrected some typo and it 
worked well untill now.

I observed Error due to class evaluation in lists created by aov fit as the fitted 
object from aov has two classes (aov and lm)

So I made a little change which seems to work.

Here it is:

# Posted by Dan Putler At 2002-07-15 16:13 
# As part of the obveRsive GUI project, we've written a function with much of
# the functionality that Patrick Connolly was suggesting (which is a bit more
# compact than the output from ls.str()). Alas, no date capabilities. The
# function is call ls.objects(), and example output appears below:
ls.objects <- function (pos = 1, pattern, mode = "any", type = "any"){
    Object.Name <- ls(pos = pos, envir = as.environment(pos), pattern = pattern)
    Object.Mode <- rep("",length(Object.Name))
    Object.Type <- rep("",length(Object.Name))
    Variables <- rep("-",length(Object.Name))
    Observations <- rep("-",length(Object.Name))

    for (i in 1:length(Object.Name)){
   Object.Mode[[i]] <- mode(get(Object.Name[[i]]))
      Object.Type[[i]] <- c("unknown")
    else {
      Object.Attrib <- attributes(get(Object.Name[[i]]))

# this is the change which anable to get Correct object type with aov fits. 

      Object.Type[[i]] <- Object.Attrib$class[1]
        Variables[[i]] <- as.character(length(Object.Attrib$names))
        Observations[[i]] <- as.character(length(Object.Attrib$row.names))
     Object.Attrib <- dim(get(Object.Name[[i]]))
    Object.Type[[i]] <- c("matrix")
    Variables[[i]] <- as.character(Object.Attrib[2])
    Observations[[i]] <- as.character(Object.Attrib[1])

  if(is.vector(get(Object.Name[[i]])) && (Object.Mode[[i]]=="character" || 
    Object.Type[[i]] <- c("vector")
    Variables[[i]] <- c("1")
    Observations[[i]] <- as.character(length(get(Object.Name[[i]])))

    Object.Type[[i]] <- c("factor")
    Variables[[i]] <- c("1")
    Observations[[i]] <- as.character(length(get(Object.Name[[i]])))
  if(is.function(get(Object.Name[[i]]))) Object.Type[[i]] <- c("function")
    objList <-
    if(mode != "any") objList <- objList[objList[["Object.Mode"]] == mode,]
    if(type != "any") objList <- objList[objList[["Object.Type"]] == type,]

Best regardsPetr Pikal
petr.pikal at precheza.cz
p.pik at volny.cz

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