Sunday, 7 February 2010

Why dynamite plots are BAD

Don't use dynamite plots (barcharts displaying mean and std desv). Boxplots and violin plots exist for a reason!!!

Please read the following article about the perils of interpreting dynamite plots

And here a more balance article

A and B seems the same, C and D are the same and A/B are different of C/D

A has a large distribution
B has only TWO POINTS!!
C has an outlier
D Two distributions??

== Example in R ==

[from the Paul Murrel R graphics book]

* Barplot:

* Boxplot:
** first the boxplot
** then draw the point with jitter (random shift from the x to avoid overlapping)

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