MedCalc
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# FisherR2Z function

## Description

Fisher r to z transformation. FISHERR2Z(r) calculates the Fisher z-transformed value of r. The argument r must be greater than -1 and less than 1.

z is calculated as follows:

$$z = {1 \over 2} \ln \left({1+r \over 1-r}\right)$$

## Example

FISHERR2Z(0.8) equals 1.09861229

FISHERR2Z(