grid.show.viewport

0th

Percentile

Draw a Diagram of a Grid Viewport

This function uses Grid graphics to draw a diagram of a Grid viewport.

Keywords
dplot
Usage
grid.show.viewport(v, parent.layout = NULL, newpage = TRUE, vp.ex = 0.8, border.fill="light grey", vp.col="blue", vp.fill="light blue", scale.col="red", vp = NULL)
Arguments
v
A Grid viewport object.
parent.layout
A grid layout object. If this is not NULL and the viewport given in v has its location specified relative to the layout, then the diagram shows the layout and which cells v occupies within the layout.
newpage
A logical value to indicate whether to move to a new page before drawing the diagram.
vp.ex
positive number, typically in $(0,1]$, specifying the scaling of the layout.
border.fill
Colour to fill the border margin.
vp.col
Colour for the border of the viewport region.
vp.fill
Colour to fill the viewport region.
scale.col
Colour to draw the viewport axes.
vp
A Grid viewport object (or NULL).
Details

A viewport is created within vp to provide a margin for annotation, and the diagram is drawn within that new viewport. By default, the margin is filled with light grey, the new viewport is filled with white and framed with a black border, and the viewport region is filled with light blue and framed with a blue border. The diagram is annotated with the width and height (including units) of the viewport, the (x, y) location of the viewport, and the x- and y-scales of the viewport, using red lines and text.

Value

None.

Grid, viewport
library(grid) ## Diagram of a sample viewport grid.show.viewport(viewport(x=0.6, y=0.6, w=unit(1, "inches"), h=unit(1, "inches"))) grid.show.viewport(viewport(layout.pos.row=2, layout.pos.col=2:3), grid.layout(3, 4))