Default theme for ggplot

ggplot_theme.R

## Setting and modifying default theme for plots
theme_set(theme_gray(base_size=12, base_family="Arial") +
            theme(
              panel.border=element_rect(colour="black", fill="transparent"), 
              plot.title=element_text(face="bold", hjust=0),
              axis.text=element_text(color="black", size=14), 
              axis.text.x=element_text(angle=0, hjust=0.5),
              axis.ticks = element_line(color = "black"), # make sure tick marks are black
              panel.background=element_blank(),
              panel.grid=element_blank(),
              plot.background=element_blank(),
              strip.background = element_blank(), # facet label borders
              legend.key=element_blank(), # remove grey bg from legend elements
              legend.background=element_blank() 
            )
)

# to source this in R, run:
# devtools::source_gist("https://gist.github.com/mattgalbraith/f082ed7d152729f4ae72383e564a70e8", filename = "ggplot_theme.R")
# May need to add/update Github token
# For details see https://gist.github.com/mattgalbraith/0f9f2d75023be5355b693cb832b9abef