back-projection analysis

Description Usage Arguments Details Value Author(s) Examples

strip blank characters from the ends of a character string or skip blank lines (or lines with a particular pattern) in a file

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strip.blanks(str)
skip.blank.lines(con)
skip.pattern.lines(con,pattern,blank.ok=TRUE)

`str`	a character vector
`con`	an open connection
`pattern`	a regular expression pattern
`blank.ok`	skip blank lines as well as lines containing patterns?

skip.blank.lines() and skip.pattern.lines() read lines from a file until the first non-blank line or the first line without a specified pattern then pushes that line back

A character vector with blanks removed (for strip.blanks) or the number of lines skipped (skip.blank.lines or skip.pattern.lines)

Ben Bolker

strip.blanks(c("   a ","b","   c "))
tfn = tempfile("test")
tfile = file(tfn,open="w")
writeLines(c("","  ","abc"),tfile)
close(tfile)
tfile=file(tfn,open="r")
skip.blank.lines(tfile)
readLines(tfile)
close(tfile)
unlink(tfn)