Change the order of discrete axis Generate a…

Change the order of discrete axis.

Generate a factor with reversed levels or use a new ggplot2 option.

Examples.

df$X1 = with(df, factor(X1, levels = rev(levels(X1))))

http://stackoverflow.com/questions/7418191/sorting-dotplot-factor-axis-in-ggplot

Reverse the order of a discrete-valued axis
Get the levels of the factor



flevels <- levels(PlantGrowth$group)

"ctrl" "trt1" "trt2"
Reverse the order



flevels <- rev(flevels)

"trt2" "trt1" "ctrl"



bp + scale_x_discrete(limits=flevels)

http://www.cookbook-r.com/Graphs/Axes_(ggplot2)/#reversing-the-direction-of-an-axis

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