A QQ plot designed with statistics students in mind
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x |
A vector of data |
ax |
The name you want to call |
leg |
Optional argument that places a legend in the top left of the plot with the text given by |
cex.leg |
Optional argument that gives the magnification of the text in the legend |
This function gives a "QQ plot" that is more easily interpreted than the standard QQ plot. Instead of plotting quantiles, it plots the observed values of x
versus the values expected had x
come from a Normal distribution.
The distribution can be considered approximately Normal if the points stay within the upper/lower dashed red lines (with the possible exception at the far left/right) and if there is no overall global curvature.
Adam Petrie
Introduction to Regression and Modeling
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Questions? Problems? Suggestions? Tweet to @rdrrHQ or email at ian@mutexlabs.com.
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