[R] mosaic plot of "vcd" package does not stretch with 2-dimension?

[Achim Zeileis]

On Fri, 2 May 2008, Sang Chul Choi wrote:

> Hi,
>
> I like mosaic function of "vcd" package. I have played around it. I
> have found out that mosaic plot  data table is 2-dimension does not
> stretch when you enlarge a mosaic plot. It is okay when data table is
> 3 or more dimension. The first one is of 3-dimension table case, and
> the second one is 2-dimension. With the first plot, you can drag
> window to enlarge a plot. With the second, I cannot.

You need to set
  keep_aspect_ratio = FALSE
This is described on the man page for strucplot() (which is the workhorse
function behind mosaic()):

keep_aspect_ratio: logical indicating whether the aspect ratio should
          be fixed or not. If unspecified, the default is 'TRUE' for
          two-dimensional tables and 'FALSE' otherwise.

hth,
Z

> I have gone through the document, but I could not find any specific to
> solve this problem.
>
> Thank you,
>
> Sang Chul
>
> ===========================================================
> music = c(210, 194, 170, 110,
>            190, 406, 730, 290)
> dim(music) = c(2, 2, 2)
> dimnames(music) = list(Age = c("Old", "Young"),
>                         Education = c("High", "Low"),
>                         Listen = c("Yes", "No"))
> mosaic(music)
> ===========================================================
>
> ===========================================================
> music = c(210, 194, 170, 110,
>            190, 406, 730, 290)
> dim(music) = c(2, 4)
> dimnames(music) = list(Age = c("Old", "Young"),
>                         Education = c("High", "Low", "Upper", "Lower"))
> mosaic(music)
>
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