[R] Re: thick plot lines

Spencer Graves spencer.graves at pdf.com
Tue Apr 29 23:50:05 CEST 2003

	  "Modern Applied Statistics with S" provides a reasonable 
introduction, I think.

	  For people who already know more or less what they want, the 
documentation for "par" is useful.

hth.  spencer graves

Faheem Mitha wrote:
> On Tue, 29 Apr 2003, Faheem Mitha wrote:
>>Dear People,
>>In a qqplot I am doing, I get lines/points that are very thick. I've tried
>>setting the lwd variable to 0.1, but it doesn't seem to have any effect.
>>Also, I have set the value of lty to dashed, but I still get dots. The
>>command looks like
>>       xlim=c(-theta,theta), ylim=c(-theta,theta), lwd=0.1,
>>       xlab="Marginal Quartiles", ylab="Empirical Marginal", col="red", lty="dashed")
>>I tried putting
>>before this, but this doesn't have any effect either.
>>I'm now wondering if I am doing something wrong. Does qqplot perhaps not
>>accept these parameters? What should I do to make the lines/points
> Thanks to the numerous people who replied. I stupidly did not realise that
> the parameters lwd and lty would not apply unless I was plotting a line. I
> think I assumed that the default points would turn into dashes and also
> become smaller or something. :-) I should have realised that line type and
> line width meant what they said. Excuse me, it was late at night.
> Adding type="line" does indeed work. I suppose that if I wanted to shrink
> the points I would use cex?
> I think I need to look at a graphing tutorial. I see the "Contributed"
> page has
>     * Using R for Data Analysis and Graphics?  by John Maindonald.
>     * Statistical Computing and Graphics Course Notes? by Frank E.
>       Harrell.
> Any other suggestions? Google (usually invaluable) is useless for this,
> since searching for "R" is not very productive. Now if it was only called
> SuperDuperStatPackage...
>                                                    Faheem.
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