[R] Scatter plot

[markleeds at verizon.net]

   Hi Stephen: If you want to take tem out of quotes, you can use deparse
   substitute as in below. Maybe there are other ways
   also  but  that's  the  one I  often see used. I hope this email ends
   up looking okay because my mailer has been acting strangely lately.
   Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
   Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
   Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
   Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  Mark
   reg.line <- function(yin,xin, data) {

   Â Â Â Â  yval <- deparse(substitute(yin))
   Â Â Â Â  xval <- deparse(substitute(xin))
   Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
   Â Â Â Â  plot(data[,yval]~data[,xval], main=paste(xval,"vs.",yval, sep=" "),
   xlab=xval, ylab=yval, pch=20)
   Â Â Â Â  line <- lm(data[,yval]~data[,xval])
   Â Â Â Â  d <- summary(line)
   Â Â Â Â    mtext(3,   line=1,   adj=0.25   ,text=bquote(bold(R^2==   ~
   .(d$r.squared))), bty="n")
   Â Â Â Â  abline(line)

   }

   Â Â Â Â
   x <- 1:100+rnorm(100)
   y <- 1:100
   z <- data.frame(x,y)
   reg.line(y,x,data=z)

   On Apr 1, 2009, stephen sefick <ssefick at gmail.com> wrote:

     #excel like regression line but better
     reg.line <- function(y,x, data)
     {plot(data[,y]~data[,x], main=paste(x,"vs.",y, sep=" "), xlab=x, ylab=y,
     pch=20)
     line <- lm(data[,y]~data[,x])
     d <- summary(line)
     mtext(3, line=1, adj=0.25 ,text=bquote(bold(R^2== ~ .(d$r.squared))),
     bty="n")
     abline(line)}
     x <- 1:100+rnorm(100)
     y <- 1:100
     z <- data.frame(x,y)
     reg.line(y="y",x="x",data=z)
     try this - as an aside does anyone know how to take the x and y out of
     quotes. What can I do differently
     hope this helps
     Stephen Sefick
     On Wed, Apr 1, 2009 at 9:41 PM, Peter Alspach
     <[1]PAlspach at hortresearch.co.nz> wrote:
     > Tena koe Sueli
     >
     > ?abline
     > ?text
     >
     > HTH ...
     >
     > Peter Alspach
     >
     >> -----Original Message-----
     >> From: [2]r-help-bounces at r-project.org
     >> [mailto:[3]r-help-bounces at r-project.org] On Behalf Of Sueli Rodrigues
     >> Sent: Thursday, 2 April 2009 2:35 p.m.
     >> To: [4]r-help at r-project.org
     >> Subject: [R] Scatter plot
     >>
     >>
     >> Hi. How do I plot the straight line and r² in a scatter plot
     >> using a simple file x~y?
     >>
     >> Sueli Rodrigues
     >>
     >> Eng. Agrônoma - UNESP
     >> Mestranda - USP/ESALQ
     >> PPG-Solos e Nutrição de Plantas
     >> Fones (19)93442981
     >> Â  Â  Â  (19)33719762
     >>
     >> ______________________________________________
     >> [5]R-help at r-project.org mailing list
     >> [6]https://stat.ethz.ch/mailman/listinfo/r-help
     >> PLEASE do read the posting guide
     >> [7]http://www.R-project.org/posting-guide.html
     >> and provide commented, minimal, self-contained, reproducible code.
     >>
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     --
     Stephen Sefick
     Let's not spend our time and resources thinking about things that are
     so little or so large that all they really do for us is puff us up and
     make us feel like gods. We are mammals, and have not exhausted the
     annoying little problems of being mammals.
     -K. Mullis
     ______________________________________________
     [11]R-help at r-project.org mailing list
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     PLEASE do read the posting guide
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     and provide commented, minimal, self-contained, reproducible code.

References

   1. mailto:PAlspach at hortresearch.co.nz
   2. mailto:r-help-bounces at r-project.org
   3. mailto:r-help-bounces at r-project.org
   4. mailto:r-help at r-project.org
   5. mailto:R-help at r-project.org
   6. https://stat.ethz.ch/mailman/listinfo/r-help
   7. http://www.R-project.org/posting-guide.html
   8. mailto:R-help at r-project.org
   9. https://stat.ethz.ch/mailman/listinfo/r-help
  10. http://www.R-project.org/posting-guide.html
  11. mailto:R-help at r-project.org
  12. https://stat.ethz.ch/mailman/listinfo/r-help
  13. http://www.R-project.org/posting-guide.html