[R] lower triangle of the correlation matrix with xtable

Thu Sep 2 16:03:45 CEST 2010

try lower.tri

and see

??lower.tri

Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034

Steve_Friedman at nps.gov
Office (305) 224 - 4282
Fax     (305) 224 - 4147

             Olga Lyashevska                                               
             <olga at herenstraat                                             
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                                                                   Subject 
             09/02/2010 09:51          [R] lower triangle of the           
             AM                        correlation matrix with xtable      

Dear all,

mydata<-data.frame(x1=c(1,4,6),x2=c(3,1,2),x3=c(2,1,3))
cor(mydata)
           x1         x2        x3
x1  1.0000000 -0.5960396 0.3973597
x2 -0.5960396  1.0000000 0.5000000
x3  0.3973597  0.5000000 1.0000000

I wonder if it is possible to fill only lower triangle of this
correlation matrix? Using 'dist' doesn't seem to be useful as it doesnt
allow to convert this table with xtable.

print(xtable(cor(mydata),digits=3))

Any ideas?
Cheers,
Olga

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