Description Usage Arguments Value References See Also Examples
View source: R/Tetra.Corr.BB.R
This function computes the tetrachoric correlation matrix for binary-binary combinations as formulated in Demirtas et al. (2012).
1 | Tetra.Corr.BB(n.BB, prop.vec, corr.vec = NULL, corr.mat = NULL)
|
n.BB |
Number of binary variables. |
prop.vec |
Probability vector for binary variables. |
corr.vec |
Vector of elements below the diagonal of correlation matrix ordered columnwise. |
corr.mat |
Specified correlation matrix. |
A correlation matrix of size n.BB*n.BB.
Demirtas, H., Hedeker, D., and Mermelstein, R.J. (2012). Simulation of massive public health data by power polynomials. Statistics in Medicine, 31(27), 3337-3346.
Tetra.Corr.BB
, Biserial.Corr.BN
, overall.corr.mat
1 2 3 4 5 6 7 8 9 10 11 | n.BB=2
prop.vec=c(0.4,0.7)
corr.vec=NULL
corr.mat=matrix(c(1.0,-0.3,-0.3,-0.3,-0.3,-0.3,
-0.3,1.0,-0.3,-0.3,-0.3,-0.3,
-0.3,-0.3,1.0,0.4,0.5,0.6,
-0.3,-0.3,0.4,1.0,0.7,0.8,
-0.3,-0.3,0.5,0.7,1.0,0.9,
-0.3,-0.3,0.6,0.8,0.9,1.0),6,by=TRUE)
tetcor.mat=Tetra.Corr.BB(n.BB,prop.vec,corr.vec=NULL,corr.mat)
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