hadley/gtable — pull request #36 by kohske (2012-09-26 23:17:59+00:00)
Title: creation of gtable via nrow/ncol and default.units.

```r
gt <- gtable(1:3, 1:2)
gtable_show_layout(gt)

gt <- gtable(c(1, 2, 1), c(1, 1), default.units = "cm")
gtable_show_layout(gt)

gt <- gtable(nrow = 3, ncol = 2)
gtable_show_layout(gt)

gt <- gtable(nrow = 3, ncol = 2, default.units = "cm")
gtable_show_layout(gt)
```