| \name{depth} |
| \alias{depth} |
| \alias{depth.viewport} |
| \alias{depth.path} |
| \title{ |
| Determine the number of levels in an object. |
| } |
| \description{ |
| Determine the number of levels in a viewport stack or tree, |
| in a viewport path, or in a grob path. |
| } |
| \usage{ |
| depth(x, ...) |
| \method{depth}{viewport}(x, ...) |
| \method{depth}{path}(x, ...) |
| } |
| %- maybe also 'usage' for other objects documented here. |
| \arguments{ |
| \item{x}{ |
| Typically a viewport or viewport stack or viewport tree or viewport |
| list, or a viewport path, or a grob path. |
| } |
| \item{\dots}{ Arguments used by other methods. } |
| } |
| \details{ |
| Depths of paths are pretty straightforward because they contain |
| no branchings. The depth of a viewport stack is the sum of the depths |
| of the components of the stack. The depth of a viewport tree is |
| the depth of the parent plus the depth of the children. |
| The depth of a viewport list is the depth of the last component |
| of the list. |
| } |
| \value{ |
| An integer value. |
| } |
| \seealso{ |
| \code{\link{viewport}}, \code{\link{vpPath}}, \code{\link{gPath}}. |
| } |
| \examples{ |
| vp <- viewport() |
| depth(vp) |
| depth(vpStack(vp, vp)) |
| depth(vpList(vpStack(vp, vp), vp)) |
| depth(vpPath("vp")) |
| depth(vpPath("vp1", "vp2")) |
| } |
| \keyword{dplot} |