diff --git a/algo/de/population.go b/algo/de/population.go
index f80b15e..aaaa200 100644
--- a/algo/de/population.go
+++ b/algo/de/population.go
@@ -78,7 +78,21 @@ func (p *Population) Reinit() {
 
 // ReinitN reinitialises the individual at position n.
 func (p *Population) ReinitN(n uint) {}
-func (p *Population) Clear()         {}
+
+// Clear sets all vectors to 0.
+func (p *Population) Clear() {
+	if p.Population != nil {
+		for _, v := range p.Population {
+			v.CurX = make([]float64, p.Dimen)
+			v.CurC = make([]float64, p.Dimen)
+			v.CurF = make([]float64, p.Dimen)
+			v.CurV = make([]float64, p.Dimen)
+			v.BestX = make([]float64, p.Dimen)
+			v.BestC = make([]float64, p.Dimen)
+			v.BestF = make([]float64, p.Dimen)
+		}
+	}
+}
 
 // meanVelocity computes the mean current velocity of all individuals in the population.
 func (p *Population) MeanVelocity() float64 { return 0.0 }