Revision: 18978
http://sourceforge.net/p/gate/code/18978
Author: adamfunk
Date: 2015-10-29 15:55:39 +0000 (Thu, 29 Oct 2015)
Log Message:
-----------
provide old scale as non-default option
Modified Paths:
--------------
gate/trunk/plugins/TermRaider/src/gate/termraider/modes/Normalization.java
Modified:
gate/trunk/plugins/TermRaider/src/gate/termraider/modes/Normalization.java
===================================================================
--- gate/trunk/plugins/TermRaider/src/gate/termraider/modes/Normalization.java
2015-10-29 15:38:43 UTC (rev 18977)
+++ gate/trunk/plugins/TermRaider/src/gate/termraider/modes/Normalization.java
2015-10-29 15:55:39 UTC (rev 18978)
@@ -14,14 +14,18 @@
public enum Normalization {
None,
Hundred,
- Sigmoid;
+ Sigmoid,
+ SigmoidOld;
// Old scale was mushing too many terms together where rounding made them
// all appear tied for 100.0.
- private static double xScale = 80;
+ // The old scale is available as a non-default option for backward
compatibility
+ private static double xScaleDefault = 80;
+ private static double xScaleOld = 4.8;
+
public static double calculate(Normalization mode, Number raw) {
if (mode == None) {
return raw.doubleValue();
@@ -31,8 +35,13 @@
return 100.0 * raw.doubleValue();
}
+ if (mode == SigmoidOld) {
+ return normalizeScore(raw.doubleValue(), xScaleOld);
+ }
+
+
// must be sigmoid
- return normalizeScore(raw.doubleValue());
+ return normalizeScore(raw.doubleValue(), xScaleDefault);
}
@@ -43,7 +52,7 @@
* @param score from 0 to inf
* @return score from 0 to 100
*/
- private static double normalizeScore(double score) {
+ private static double normalizeScore(double score, double xScale) {
double norm = 2.0 / (1.0 + Math.exp(-score / xScale)) - 1.0;
return (double) (100.0F * norm);
}
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