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Fisher's Z transformation

Source: R/fisherTransform.R
fisherZ.Rd

fisherZ returns (squeezed) Fisher's Z transformed Pearson's r

Usage

fisherZ(cormat)

Arguments

cormat

Pearson correlation matrix

Value

Fisher Z transformed Pearson correlations

Examples


#Generate a random binary (-1, 1) matrix
(mat <- matrix(sample(c(1,-1), 25, replace = TRUE), ncol = 5))
#>      [,1] [,2] [,3] [,4] [,5]
#> [1,]   -1   -1    1   -1    1
#> [2,]   -1    1   -1   -1   -1
#> [3,]    1    1   -1   -1   -1
#> [4,]    1   -1   -1   -1    1
#> [5,]   -1   -1    1   -1    1

#Correct matrix diag
diag(mat) <- 1

#Transform
fisherZ(mat)
#>           [,1]      [,2]      [,3]      [,4]      [,5]
#> [1,]  7.254329 -7.254329  7.254329 -7.254329  7.254329
#> [2,] -7.254329  7.254329 -7.254329 -7.254329 -7.254329
#> [3,]  7.254329  7.254329  7.254329 -7.254329 -7.254329
#> [4,]  7.254329 -7.254329 -7.254329  7.254329  7.254329
#> [5,] -7.254329 -7.254329  7.254329 -7.254329  7.254329