Re: [Rd] `mgp[1:3]' are of differing sign (PR#14130)

[Peter Dalgaard]

Peter Ehlers wrote:

cornell.p.gonsch...@iem.fh-friedberg.de wrote:
Full_Name: Cornell Gonschior
Version: 2.10.0
OS: Linux
Submission from: (NULL) (212.201.28.40)


Hi,

in the introduction to R, you can find the following sentence in the 
par()
chapter:
"Use tck=0.01 and mgp=c(1,-1.5,0) for internal tick marks."
I thought that's nice, because I wanted to have tick marks and tick 
labels
inside and the axis title outside.

But:
plot(z, las=1, tck=0.01, mgp=c(1,-1.5,0))
Warnmeldungen:
1: In plot.window(...) : `mgp[1:3]' are of differing sign
2: In plot.xy(xy, type, ...) : `mgp[1:3]' are of differing sign
3: In axis(side = side, at = at, labels = labels, ...) :
  `mgp[1:3]' are of differing sign
4: In axis(side = side, at = at, labels = labels, ...) :
  `mgp[1:3]' are of differing sign
5: In box(...) : `mgp[1:3]' are of differing sign
6: In title(...) : `mgp[1:3]' are of differing sign

par(las=1, tck=0.01, mgp=c(1,-1,0))
Warnmeldung:
In par(las = 1, tck = 0.01, mgp = c(1, -1, 0)) :
  `mgp[1:3]' are of differing sign

Was there a recent change, couldn't find anything useful searching the 
web.

Regards,
Cornell

Well, it's only a warning, making you aware of a possibly
unintended par setting. Warnings are good things but if you
don't want to see them, they can be suppressed.

Certainly not a bug.

Hmm, then again, I tend to agree with Cornell that there are a bit too 
many cases where mgp[1:3]' would sensibly have differing sign, compared 
to cases where it is a mistake. In addition to internal tick marks and 
labels, there are also cases where the whole axis is shifted into the 
plot area. I'd more likely use axis(pos=...) for that, but still.

--
   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark      Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalga...@biostat.ku.dk)              FAX: (+45) 35327907

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