Graphics Reference
In-Depth Information
Figure
.
.
Two views of a layout that defines a central region with equal-sized margins all around
(indicated by the grey rectangles). he location and shape of the central region depend on the size and
shape of the 'page' which the layout is applied to; the let-hand page is tall and thin and the right-hand
page is short and wide
Figure
.
.
he difference between transformations in statistical graphics (let) and a general graphics
language (right). In statistical graphics, the location of the text depends on the coordinate system, but
the size of text is controlled separately from coordinate-system transformations. In a general graphics
system, all output, including text size, is affected by the current transformation; in this case, the text
gets flipped upside down and drawn one-quarter of the size of normal text
Combining Graphical Elements
3.3.2
In addition to allowing the userto compose basic graphics shapes and position them
flexibly, a statistical graphics system should allow the user to 'record' a composition
of graphics shapes. For example, the user should be able to write a function that en-
capsulates a series of drawing operations. his does two things: the complete set of
operations becomes easily available for other people to use, and the function repre-
sents a higher-level graphical element that can be used as part of further composi-
tions.
