r - What is the use of 'length.out' and 'along.with' arguments in gslider()? -


what use of length.out , along.with arguments in gslider() gwidgets2? in ?gslider can see (the rather counter-intuitive): 

by              step size if not specified length.out      in place of along.with      in place of length.out

does imply 3 arguments synonyms?

look @ source code.

 if (!is.null(length.out)) {    <- (to - from)/(length.out[1] - 1)  }

if present, length.out = 5, sets by (to - from) / 4. latter,

if (!missing(along.with)) {    length.out <- length(along.with) }

it allows to, e.g., pass list of length n , length.out n. won't speak usefulness of these arguments guess author must have thought they'd come in handy.


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