plot composition: theme(figure_size) ignored in 0.16a3

[ilia-kats]

I'm trying to reproduce the example, but I can't get the composition to change size.

from plotnine import (
    ggplot,
    aes,
    geom_point,
    geom_boxplot,
    geom_bar,
    geom_smooth,
    facet_wrap,
    labs,
    theme,
    theme_538,
    element_rect,
    element_text,
)
from plotnine import *
from plotnine.composition import plot_spacer
from plotnine.data import mtcars
p1 = ggplot(mtcars, aes("disp", "qsec")) + geom_smooth()
p2 = ggplot(mtcars, aes("wt", "mpg")) + geom_point()
p3 = ggplot(mtcars, aes("factor(gear)", "mpg")) + geom_boxplot()
p4 = ggplot(mtcars, aes("carb")) + geom_bar()

composition = (p1 | (p2 / p3) | p4)

Running

composition + theme(figure_size=(20, 20))

with different values for figure_size always results in the same plot. It works with plotnine 0.15.3.

[has2k1]

The API changed but it won't show up in the documentation examples until the final version.

The figure_size is taken from the default theme. So you can do something like this to change the figure size for all plots whether single plots or compositions.

theme_set(theme_get() + theme(figure_size=(20, 20)))

Alternatively, now that we have plot_annotation, you can set the theme for the composition.

composition + plot_annotation(theme=theme(figure_size=(20, 20)))