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I am working on finishing up a graph generated using ggplot2 like so...
ggplot(timeSeries, aes(x=Date, y=Unique.Visitors, colour=Revenue)) + geom_point() + stat_smooth() + scale_y_continuous(formatter=comma) I have attached the result and you can see the numeric values in the legend for Revenue do not have a comma. How can I add a comma to those values? I was able to use scale_y_continuous for the axis, can that be used for the legend also?
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You can use the following syntax to change the legend labels in ggplot2: p + scale_fill_discrete(labels=c('label1', 'label2', 'label3', ...))
To change the Size of Legend, we have to add guides() and guide_legend() functions to the geom_point() function. Inside guides() function, we take parameter color, which calls guide_legend() guide function as value. Inside guide_legend() function, we take an argument called override.
You can place the legend literally anywhere. To put it around the chart, use the legend. position option and specify top , right , bottom , or left . To put it inside the plot area, specify a vector of length 2, both values going between 0 and 1 and giving the x and y coordinates.
Just to keep current, in ggplot2_0.9.3 the working syntax is:
require(scales) ggplot(timeSeries, aes(x=Date, y=Unique.Visitors, colour=Revenue)) + geom_point() + stat_smooth() + scale_y_continuous(labels=comma) + scale_colour_continuous(labels=comma) Also see this exchange
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Note 2014-07-16: the syntax in this answer has been obsolete for some time. Use metasequoia's answer!
Yep - just a matter of getting the right scale_colour_ layer figured out. Try:
ggplot(timeSeries, aes(x = Date, y = Unique.Visitors, colour = Revenue)) + geom_point() + stat_smooth() + scale_y_continuous(formatter = comma) + scale_colour_continuous(formatter = comma) I personally would also move my the colour mapping to the geom_point layer, so that it doesn't give you that odd line behind the dot in the legend:
ggplot(timeSeries, aes(x = Date, y = Unique.Visitors)) + geom_point(aes(colour = Revenue)) + stat_smooth() + scale_y_continuous(formatter = comma) + scale_colour_continuous(formatter = comma) If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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