R help - Jul 2009 - superimpose multiple scatterplot matrices

Dear R- experts,

 

I am trying to superimpose two or more scatterplot matrices generated by pairs()
to visualize the differences over each datasets, but have not been very
successful. Two data frames, df1 and df2 for example, each has the same five
variables in columns.

My goal is to paint each dataset with a color on the same plot panel for each
pair of the five variables.

That is, in this example a 5x5 matrix consists 25 panels, and each panel would
have two datasets with two different colors.

 

Any comments and suggestions are welcome.

 

Best,

PingHsun


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Ping-Hsun Hsieh wrote:
> Dear R- experts,
>
>  
>
> I am trying to superimpose two or more scatterplot matrices generated by
pairs() to visualize the differences over each datasets, but have not been very
successful. Two data frames, df1 and df2 for example, each has the same five
variables in columns.
>
> My goal is to paint each dataset with a color on the same plot panel for
each pair of the five variables.
>   
Use the lattice splom instead of the regular graphics pairs plot.

tmp <- data.frame(a=rnorm(100), b=rnorm(100, m=rep(c(1,3), each=50)),
                            cc=rnorm(100), g=rep(letters[1:2], each=50))
splom(~tmp[1:3], groups=tmp$g)