geom_hline and qplot
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David Hajage
Mar 27, 2009, 12:30:50 PM3/27/09
to ggplot2
Hello,
I don't understand the difference between this two examples :
p <- qplot(x = mtcars$wt, y=mtcars$mpg) # Doesn't work
p
p + geom_hline(yintercept=20)
Erreur dans data.frame(..., check.names = FALSE) :
les arguments impliquent des nombres de lignes différents : 32, 1
q <- qplot(x = wt, y=mpg, data = mtcars) # Works
q + geom_hline(yintercept=20)
I know that it is better to work with one data.frame instead of two vectors, but I would like to know why the first example doesn't work...
Thank you very much.
David
I don't understand the difference between this two examples :
p <- qplot(x = mtcars$wt, y=mtcars$mpg) # Doesn't work
p
p + geom_hline(yintercept=20)
Erreur dans data.frame(..., check.names = FALSE) :
les arguments impliquent des nombres de lignes différents : 32, 1
q <- qplot(x = wt, y=mpg, data = mtcars) # Works
q + geom_hline(yintercept=20)
I know that it is better to work with one data.frame instead of two vectors, but I would like to know why the first example doesn't work...
Thank you very much.
David
hadley wickham
Mar 27, 2009, 12:45:47 PM3/27/09
to David Hajage, ggplot2
David Hajage
Mar 27, 2009, 1:27:44 PM3/27/09
to ggplot2
Woow, it's fast.
David
David
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