Show x-axis and y-axis for every plot in facet_grid

Change facet_grid(Spher~effSize) to facet_wrap(Spher~effSize, scales = "free")

The ggh4x package also has this functionality via its facet_wrap2 function

I'm late to this party, but I have two workarounds currently.

The first option is to add horizontal and/or vertical line geoms with intercepts set to -Inf, which requires turning off plot clipping. To the original plot, add the following lines:

geom_hline(aes(yintercept=-Inf)) + 
geom_vline(aes(xintercept=-Inf)) + 
coord_cartesian(clip="off")

Fake Axis Option

Alternatively, use the lemon package and its facet command. This will reproduce the axes and their ticks without adding the labels.

library(lemon)

And change facet_grid(Spher~effSize) to facet_rep_grid(Spher~effSize)

Lemon Package Option