||
r partial correlation
ph=data
ph1=cor(ph)
p=solve(ph1)
rp1,2=p[1,2]/sqrt(p[1,1]*p[2,2])
rp1,2
sigificance test
t=rp1,2*sqrt(n-m)/sqrt(1-rp1,2)
t
n simple size
m number of variable
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