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mymodel
2007 Jun 21
2
abline plots at wrong abscissae after boxplot
...lot originally made with "boxplot", but
the lines appear in the wrong place. Below is a script that
illustrates the problem
# boxablinetest.R - script to show problem with abline on box plot
x <- c( 2, 2, 2, 3, 3, 3, 4, 4, 4)
y <- c( 1, 2, 3, 2, 3, 4, 3, 4, 5)
xymodel <- lm( y~x)
boxplot( y~x)
abline( xymodel) # Wrong abcissae
abline( v = 2.5) # Wrong abcissa
abline( h = 2.75) # Right ordinate
# -------------- end --------------
Here, I'm making a box plot with abscissae that start at...