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Diffstat (limited to 'gi/posterior-regularisation/prjava/src/util/DigammaFunction.java')
-rw-r--r--gi/posterior-regularisation/prjava/src/util/DigammaFunction.java21
1 files changed, 0 insertions, 21 deletions
diff --git a/gi/posterior-regularisation/prjava/src/util/DigammaFunction.java b/gi/posterior-regularisation/prjava/src/util/DigammaFunction.java
deleted file mode 100644
index ff1478ad..00000000
--- a/gi/posterior-regularisation/prjava/src/util/DigammaFunction.java
+++ /dev/null
@@ -1,21 +0,0 @@
-package util;
-
-public class DigammaFunction {
- public static double expDigamma(double number){
- if(number==0)return number;
- return Math.exp(digamma(number));
- }
-
- public static double digamma(double number){
- if(number > 7){
- return digammApprox(number-0.5);
- }else{
- return digamma(number+1) - 1.0/number;
- }
- }
-
- private static double digammApprox(double value){
- return Math.log(value) + 0.04167*Math.pow(value, -2) - 0.00729*Math.pow(value, -4)
- + 0.00384*Math.pow(value, -6) - 0.00413*Math.pow(value, -8);
- }
-}