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## Function to replace all tabs in a string with an appropriate number of spaces.
# handle a single character string
replaceTabs.inner <- function( text, width=8 )
{
spaces <- " "
if(nchar(text)<1) return(text)
text.split <- strsplit(text,"\t")[[1]]
if(length(text.split)==1)
return(text)
else
{
nSpaceAdd <- 8 - nchar(text.split) %% 8
nSpaceAdd[length(nSpaceAdd)] <- 0
nSpaceAdd[nSpaceAdd==8] <- 0
retval <- ""
for(i in 1:length(text.split))
{
tmp.text <- chartr("\t"," ", text.split[i]) # one space here
retval <- paste(retval, tmp.text, substr(spaces,0,nSpaceAdd[i]-1 ), sep='' ) # rest here
}
return(retval)
}
}
replaceTabs <- function(text, width=8)
{
text <- as.character(text)
retval <- sapply(text, replaceTabs.inner)
names(retval) <- names(text)
retval
}
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