Qqnorm plots with Shapiro-Wilk's test
Quantile-normal plots with Shapiro-Wilk's test result integrated
shapiro.qqnorm (x, ...)
x |
A numeric vector |
... |
Graphical parameters passed to 'par' |
To test a variable 'x' against the normal distribution, a qqnorm plot is integrated with the Shapiro-Wilk test to enhance interpretation.
Virasakdi Chongsuvivatwong <cvirasak@medicine.psu.ac.th>
'shapiro.test', 'qqnorm', 'par'
x <- rnorm(10) a <- LETTERS[1:10] shapiro.qqnorm(x, pch=a, col="red") qqline(x, lty=2, col="black")
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