For regression models,
coord_obs_pred() can be used in a ggplot to make the
x- and y-axes have the same exact scale along with an aspect ratio of one.
coord_obs_pred(ratio = 1, xlim = NULL, ylim = NULL, expand = TRUE, clip = "on")
Aspect ratio, expressed as
Limits for the x and y axes.
Not currently used.
Should drawing be clipped to the extent of the plot panel? A setting
of "on" (the default) means yes, and a setting of "off" means no. In most
cases, the default of "on" should not be changed, as setting
data(solubility_test, package = "modeldata") library(ggplot2) p <- ggplot(solubility_test, aes(x = solubility, y = prediction)) + geom_abline(lty = 2) + geom_point(alpha = 0.5) pp + coord_fixed()p + coord_obs_pred()