R devel - Jun 1998 - lty

I find, viewing the output with ghostview, that lty="2","3",
or "4" gives
the same dashed line. So basically you have choice of solid ("1") or
dashed ("2","3","4").

If this is not implemented yet, maybe the docs should reflect it?

Hmm now I tried plotting with both lty="2" and lty="3" for
two separate
functions on one plot, and the lty="2" one is invisible now.  This
looks
like a bug in the snapshot.

Thanks for any help.

Bill Simpson

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Sorry, my previous message said using lty="2" made line disappear. 
Wrong.

What happens is that
"2" is dots
"3" is dashes

BUT docs say
"2" is dashes
"3" is dots

So there is an error in the docs.

Bill

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Thank you, Bill, for your reports ("lwd" and "lty").
In the future, would you please indicate exactly which version of R you are
using?

"lwd":  in 0.61.x, it only works for x11/X11, not for postscript.
	in 0.62.x  it should work in all cases, also in combination with lty.

 lty :  Could n't your problem of seeing just one kind of dot-dashes
	be a problem of screen / device resolution alone?

Thanks again for these bug reports; at the moment we are interested
increasingly more and more for report about 0.62. But even there
-- since we are now in a "fixing" mode -- you have to indicate the
version
  (date) that you are using.

Martin
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I am using
[1] "Unstable-snapshot"

$status.rev
[1] "0"

$major
[1] "0"

$minor
[1] "62.0"

$year
[1] "1998"

$month
[1] "April"

$day
[1] "12"

If I do:
plot(x,y, type="l")
par(lwd=4)
lines(tt,pts)

The 2nd curve does appear to be heavy (correct line width) in X11 window,
however saved plot (dev.print) uses just single pixel line width (as seen
when viewed in ghostview or when printed out).

So if lwd is supposed to work in version .62.0, then there is a bug.
Or else I need a newer snapshot.

As for lty, this was just a confusion of lty="2" and lty=2, etc, as
Peter said.  Yes as you say Martin the screen resolution does enter into
it, but I was basing my comments on printouts.

Bill

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>>>>> "Bill" == Bill Simpson
<wsimpson@uwinnipeg.ca> writes:
    Bill> I am using [1] "Unstable-snapshot"

    Bill> $status.rev [1] "0"
    Bill> $major [1] "0"
    Bill> $minor [1] "62.0"
    Bill> $year [1] "1998"
    Bill> $month [1] "April"
    Bill> $day [1] "12"

    Bill> If I do: plot(x,y, type="l") par(lwd=4) lines(tt,pts)

    Bill> The 2nd curve does appear to be heavy (correct line width) in X11
    Bill> window, however saved plot (dev.print) uses just single pixel
    Bill> line width (as seen when viewed in ghostview or when printed
    Bill> out).

    Bill> So if lwd is supposed to work in version .62.0, then there is a
    Bill> bug.  Or else I need a newer snapshot.
			^^^^^^^^^^^^^^^^^^^^^^^
exactly.  "lwd" for PostScript only works for a week or so:

On May 27, Paul Murrell wrote to  R-core

  PM> The Postscript device driver has been modified so that it now takes
  PM> notice of the current line width
  PM> 
  PM> Also, the line texture specification (or line type) is now scaled for
  PM> the current line width for both X11 and PostScript graphics
  PM> 
  PM> the best way to see the difference is to do 
  PM> 
  PM> 	plot(1:10, lty=3, lwd=3, type="l")  # to see X11 version
  PM> 	dev.print() # to get postscript version
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