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

[Sang Chul Choi]

Thank you very much!

Sang Chul

On May 2, 2008, at 12:06 PM, Dieter Menne wrote:

> Sang Chul Choi <choi <at> biology.rutgers.edu> writes:
>> 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.
>>
>
>> ===========================================================
>> 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)
>
> Not really: note that the images resizes correctly, it just keeps  
> its square
> aspect-ratio.
>
> vcd is so strongly modularized that it can be difficult to find the  
> information
> required. Check strucplot, where it says:
>
> strucplot
> 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.
>
> So try
>
> mosaic(music, keep_aspect_ratio=FALSE)
>
> but think over if that's really what you want. In most cases it makes
> sense to keep the square aspect for 2x2 cases
>
> Dieter
>
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