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*<math>x</math> is the number.
*<math>x</math> is the number.
==Description==
==Description==
*This function gives the value of Fisher transformation at x.
*This function gives the value of Fisher transformation at <math>x</math>.
*Fisher transformation is used to test the hypothesis of two correlations.
*Fisher transformation is used to test the hypothesis of two correlations.
*It is mainly associated with the Pearson product-moment correlation coefficient for bivariate normal observations.
*It is mainly associated with the Pearson product-moment correlation coefficient for bivariate normal observations.
*In FISHER(X), x is the number which ranges between -1 to +1.
*In FISHER(X), x is the number which ranges between -1 to +1.
*The transformaton is defined by : z=1/2 ln(1+x/1-x)= arctanh(x), where "ln" is the natural logarithm function and "arctanh" is the inverse hyperbolic function.
*The transformaton is defined by : <math>z=1/2 ln(1+x/1-x)= arctanh(x)</math>, where "ln" is the natural logarithm function and "arctanh" is the inverse hyperbolic function.
*This function will give the result as error when:
*This function will give the result as error when:
#x is nonnumeric
#x is nonnumeric