[R] Values in scatterplot??

[Jhope]

Hi R-listers, 

I am having trouble plotting the values for the R2 line, lowess smooth,
smothered conditional spread, outlier identification. 
I have tried the function text and legend but was unsuccessful. Please see
below.

Your help would be appreciated. Thanks in advance.

Jean



library(car)
> SPHSHTL <- scatterplot(HSuccess ~ HTL,
+                        data = data.to.analyze,
+                        xlab = "Distance to high tide line (metres)",
+                        ylab = "Hatching success (%)")

> legend("topright", bty="n", legend=paste("R2 is",
+                                         
format(summary(SPHSHTL)$adj.r.squared, digits=4)))
Error in summary(SPHSHTL)$adj.r.squared : 
  $ operator is invalid for atomic vectors

>text(SPHSHTL)
Error in text.default(SPHSHTL) : zero length 'labels'

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