Hi:

See below.

On Wed, Oct 6, 2010 at 2:56 PM, Gerard Smits <g_smits@verizon.net> wrote:

> Hi All,
>
> I am running a scatter plot and trying to add a best fit line.  I use an
> abline function, but get no line drawn over the points.  I also get no
> error.  I arm using V 2.10.0 on Windows 7.
>
> Here is my code, including the SAS transport file import:
>
> require (foreign)
> require (chron)
> require (Hmisc)
> require (lattice)
>
> clin  <- sasxport.get("y:\\temp\\subset.xpt")
> attach(clin)
>
>
> plot.new()
> xyplot(jitter(b.lvef)~jitter(log.fgf),
>       main="Scatter Plot of Baseline Ejection Fraction\nby Log10 FGF-23",
>       ylim=c(10,90),
>       ylab="Ejection Fraction", xlab="Log10 FGF-23")
>
> abline(lm(b.lvef~log.fgf))
>
> Try this:

 xyplot(jitter(b.lvef)~jitter(log.fgf), type = c('p', 'r'),
      main="Scatter Plot of Baseline Ejection Fraction\nby Log10 FGF-23",
      ylim=c(10,90),
      ylab="Ejection Fraction", xlab="Log10 FGF-23")

Type 'p' plots the points, 'r' the least-squares regression line. The set of
allowable types is found on p. 75 of the Lattice book.

HTH,
Dennis

Any suggestions appreciated.
>
> Thanks,
>
> Gerard
>
>
>
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>
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