use convenience function to compute output shape

cbovar · cbovar · commit 0dd8ece29657 · 2018-06-23T19:58:12.000+08:00
diff --git a/src/ConvNetSharp.Flow/Ops/MatMult.cs b/src/ConvNetSharp.Flow/Ops/MatMult.cs
@@ -52,7 +52,7 @@ public override Volume<T> Evaluate(Session<T> session)
             var left = this.Parents[0].Evaluate(session);
             var right = this.Parents[1].Evaluate(session);
 
-            var shape = new Shape(left.Shape.Dimensions[1], right.Shape.Dimensions[0], 1, left.Shape.Dimensions[3]);
+            var shape =  Volume<T>.ComputeMatMultiplyShape(left.Shape, right.Shape);
 
             if (this.Result == null || !Equals(this.Result.Shape, shape))
             {

Original file line number	Diff line number	Diff line change
`@@ -52,7 +52,7 @@ public override Volume<T> Evaluate(Session<T> session)`
`52`	`52`	`var left = this.Parents[0].Evaluate(session);`
`53`	`53`	`var right = this.Parents[1].Evaluate(session);`
`54`	`54`
`55`		`- var shape = new Shape(left.Shape.Dimensions[1], right.Shape.Dimensions[0], 1, left.Shape.Dimensions[3]);`
	`55`	`+ var shape = Volume<T>.ComputeMatMultiplyShape(left.Shape, right.Shape);`
`56`	`56`
`57`	`57`	`if (this.Result == null \|\| !Equals(this.Result.Shape, shape))`
`58`	`58`	`{`