MOD:last tree not multiply learningrate

Author: scharoun

src/main/java/com/fenbi/ytklearn/predictor/GBHMLROnlinePredictor.java

@@ -143,7 +143,12 @@ public double score(Map<String, Float> features, Object other) {
                 int vidx = ((j + 1) << 1) - 1;
                 mu[idx + j] = mu[idx + vidx] + mu[idx + vidx + 1];
             }
-            fx += learningRate * mu[idx];
+            if (tree < treeNum - 1) {
+                fx += learningRate * mu[idx];
+            } else {
+                fx += mu[idx];
+            }
+
             idx += stride;
             idxg += K;
         }

src/main/java/com/fenbi/ytklearn/predictor/GBHSDTOnlinePredictor.java

@@ -148,7 +148,12 @@ public double score(Map<String, Float> features, Object other) {
                 int vidx = ((j + 1) << 1) - 1;
                 mu[idxm + j] = mu[idxm + vidx] + mu[idxm + vidx + 1];
             }
-            fx += learningRate * mu[idxm];
+
+            if (tree < treeNum - 1) {
+                fx += learningRate * mu[idxm];
+            } else {
+                fx += mu[idxm];
+            }
 
             idx += K - 1;
             idxg += K;

src/main/java/com/fenbi/ytklearn/predictor/GBMLROnlinePredictor.java

@@ -267,7 +267,12 @@ public double score(Map<String, Float> features, Object other) {
             lfx += gk_1 * wx[idx + stride - 1];
             gating[tree * K + K - 1] = gk_1;
 
-            fx += learningRate * lfx;
+            if (tree < treeNum - 1) {
+                fx += learningRate * lfx;
+            } else {
+                fx += lfx;
+            }
+
 
             idx += stride;
         }

src/main/java/com/fenbi/ytklearn/predictor/GBSDTOnlinePredictor.java

@@ -244,7 +244,12 @@ public double score(Map<String, Float> features, Object other) {
             lfx += gk_1 * leaf[tree][vstart - 1];
             gating[tree * K + K - 1] = gk_1;
 
-            fx += learningRate * lfx;
+            if (tree < treeNum - 1) {
+                fx += learningRate * lfx;
+            } else {
+                fx += lfx;
+            }
+
             idx += stride;
 
         }