[R] correlation matrix

[1Rnwb]

Hello Gurus
I have two correlation matrices 'xa' and 'xb'
set.seed(100)
d=cbind(x=rnorm(20)+1,
x1=rnorm(20)+1,
x2=rnorm(20)+1)

 
d1=cbind(x=rnorm(20)+2,
x1=rnorm(20)+2,
x2=rnorm(20)+2)

xa=cor(d,use='complete')              

xb=cor(d1,use='complete')



I want to combine these two to get a third matrix which should have half
values from 'xa' and half values from 'xb'
           x         x1         x2
x  1.0000000  -0.15157123 -0.23085308
x1 0.3466155 1.00000000  -0.01061675
x2 0.1234507 0.01775527 1.00000000

I would like to generate a heatmap for correlation values in disease and non
disease phenotype

I would appreciate if someone can point me in correct direction.
Thanks
sharad

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