Usage
tableGrob(d, rows = rownames(d), cols = colnames(d),
theme = ttheme_default(), vp = NULL, ...)grid.table(...)
ttheme_default(base_size = 12, base_colour = "black", parse = FALSE,
padding = unit(c(4, 4), "mm"), ...)
ttheme_minimal(base_size = 12, base_colour = "black", parse = FALSE,
padding = unit(c(4, 4), "mm"), ...)