Copying and modifying a default theme

Question

I would like to create a new theme for ggplot that is based on theme_bw().

I imagine the following steps are necessary (in pseudocode):

Answer 1

Try like this one:

### Set up a blank theme
theme_none <- theme(
  panel.grid.major = element_blank(),
  panel.grid.minor = element_blank(),
  panel.background = element_blank(),
  axis.title.x = element_text(colour=NA),
  axis.title.y = element_blank(),
  axis.text.x = element_blank(),
  axis.text.y = element_blank(),
  axis.line = element_blank()
  #axis.ticks.length = element_blank()
)