[R] How to access the attributes of a ggplot?

From: Tribo Laboy <tribolaboy_at_gmail.com>
Date: Fri, 04 Apr 2008 23:58:07 +0000


Hi,

I am having some hard time figuring how to access (and modify) the properties of an object created by ggplot.

I found 'ggopts', but it only returns some of the properties. Say I want to get the x- and y-axis limits, the tickmark locations, legend current position, the legend box and background color and set them to new values.

Are these properties easily accessible (and modifiable) from the object?

Here is an example

library(ggplot2)
pobj <- ggplot(data = movies[1:300,], aes(x = year, y = length, size = rating)) + geom_point() + opts(legend.position = c(0.2,0.9))

Regards,

TL



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