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rggplot2sizetitlegridextra

How to change Title (Top) size on arrangeGrob?

I have already written a ggplot function and managed to get a multiplot with 12 plots. Therefore i need a overall title, which is already added. The problem is that it is way to small and i can`t find the function to change it. my code is:

grid.arrange(arrangeGrob(grobs=scatterplots, widths= c(1,1,1), 
             layout_matrix = rbind(c(1,2,3),
                                   c(4,5,6),
                                   c(7,8,9),
                                   c(10,11,12))),
             left="hourly ET observed [mm]",
             bottom="hourly ET gap filled [mm]",
             top="gap filled by")
Solution

  • This answer was provided by user baptiste:

    top = grid::textGrob('title', gp=grid::gpar(fontsize=24))