[R] Phi coefficient matrix (package psych)

Kumar Mainali kpmainali at gmail.com
Tue Apr 21 22:34:47 CEST 2015

I want to calculate phi coefficient for every pair of the columns. Is there
a way to generate a matrix like a correlation matrix? I know cor function
in the case below gives same answer as phi coefficient.

​x <- sample(c(0,1), 10, replace=TRUE)
y <- sample(c(0,1), 10, replace=TRUE)
z <- sample(c(0,1), 10, replace=TRUE)
df <- data.frame(x,y,z)

Thank you,
Kumar Mainali
Postdoctoral Associate
Department of Biology
University of Maryland

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