Change line width (thickness) sjPlot sjp.int R

Question

I would like to change the width of the lines (thicker lines) in an sjp.int plot. I tried all help arguments, but somehow could not find it.

Example code:

require(ggplot2) 
require(sjPlot) 
head(diamonds) 
test<-lm(price ~ carat*depth, data=diamonds)
sjp.int(test, type = "eff")

Answer 1

You cannot change line size for sjp.int currently, so you have to modify the returned plot object(s), which are in the return value plot.list. Then you can overwrite geom_line().

dummy <- sjp.int(test, type = "eff")
dummy$plot.list[[1]] + geom_line(size = 3)

I've added a geom.size argument to sjp.int, see GitHub.