User:Regina

native language

German

active in project

de, qa. sc

OOo user name

regina

special interest

www.ooowiki.de

Anleitung

ToDo

Planning Wiki-Pages

/MyDrafts

FISHER and FISHERINV

Reduced accuracy for r->0

Needs log1p for improvement

1/2*log((1+r)/(1-r)) = 1/2*log(1+2*r/(1-r)) = 1/2* log1p(2r/(1-p))

or

1/2*(log(1+r)-log(1-r)) = 1/2*( log1p(r)-log1p(-r))

Have to test this.

Same problem in FISHERINV with

(exp(2r)-1)/(exp(2r)+1)

Sandbox

Test Wiki-markup here