[R] Stacked squares plots

Jim Lemon jim at bitwrit.com.au
Tue Nov 4 10:05:11 CET 2014

On Tue, 4 Nov 2014 01:54:45 AM Osman Al-Radi wrote:
> Dear R-help users,
> I would like to produce a plot of ordered stacked coloured square 
where each
> square would represent a level of a categorical variable CAT (aprox. 
> levels), the size of the square would represent the frequency FREQ 
> of that level, the color would represent a proportion of failure 
> to 1) and the squares would be organized by size from bottom left 
to top
> right.
> It would be an extra bonus if one could produce one such plot for 
each level
> of a higher order categorical variable GROUP with say 6 levels. All in 
> plot similar to panels in lattice but without the gaps between panels.
> Any ideas. I played around with mosaicplot and rectangle but 
without a
> satisfactory result.
> example data
> 1                a          100          0.05
> 1                b            20          0.1
> And so forth.
Hi Osman,
The function color2D.matplot (plotrix) has a Hinton diagram option 
that might do what you want. The squares will be distributed on a plot 
in the same positions as the matrix that is passed as the "x" 
argument. The sizes of the squares will be proportional to "x" and the 
colors can be anything you pass as "cellcolors". Let me know if you 
have trouble working it out.


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