ggplot grobs align with tableGrob

Question

I\'m having difficulty to find solution for aligning ggplot grob and table grob. I tried to follow the instruction here but still didn\'t give the results I wanted.

Answer 1

By default the cell heights have absolute sizes to accommodate the text, but you can change them to relative units so that they scale with the plot panel,

library(grid)
library(gridExtra)
library(ggplot2)
library(tibble)
library(gtable)
dat <- tibble::rownames_to_column(mtcars, "car") #convert rownames to first col

plot1 <- ggplot(dat, aes(car, mpg)) +
  geom_bar(stat = "identity") +
  coord_flip()

g1 <- ggplotGrob(plot1)
tb1 <- tableGrob(dat$cyl, theme = ttheme_default(10))
tb1$heights = unit(rep(1/(nrow(tb1)), nrow(tb1)), "npc")
tb1$widths = unit.pmax(tb1$widths, unit(2, "lines"))
g1 <- gtable_add_cols(g1, sum(tb1$widths))
g1 <- gtable_add_grob(g1, grobs = tb1, t=6, l=ncol(g1), b=6, r=ncol(g1))

grid.newpage()
grid.draw(g1)