fix build

gonum · Jan 26, 2019 · 0ff4598 · 0ff4598
1 parent e1662bc
commit 0ff4598
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/optimize/gradientdescent.go b/optimize/gradientdescent.go
@@ -83,3 +83,13 @@ func (g *GradientDescent) NextDirection(loc *Location, dir []float64) (stepSize
 	floats.Scale(-1, dir)
 	return g.StepSizer.StepSize(loc, dir)
 }
+
+func (*GradientDescent) needs() struct {
+	Gradient bool
+	Hessian  bool
+} {
+	return struct {
+		Gradient bool
+		Hessian  bool
+	}{true, false}
+}