How to use gtable_add_grob() does not 'add'

gtable, r, r-grid

Solution

The grobs need different names:

base <- gtable_add_grob(base, 
          list(rectGrob(gp=gpar(fill="#FF000088")), textGrob(label=g)), i, j,
          name=1:2)

Problem

Why does the following plot not display the numbers (`g`; specified via `textGrob(label=g))`) in the 6 panels? If I use the text grob only, this also works, but a text grob and a rectangular grob seem to be not so easy. Unfortunately the help page of `gtable_add_grob` does not give a lot of help... ``` require(gtable) base <- gtable(widths=unit(rep(1, 2), "null"), heights=unit(rep(1, 3), "null")) g <- 1 for(i in 1:3) { for(j in 1:2) { base <- gtable_add_grob(base, list(rectGrob(gp=gpar(fill="#FF000088")), textGrob(label=g)), i, j) g <- g+1 } } grid.draw(base) ```

Original source