A Strange Behavior of NewVector

[zhenghaoz]

Hi. I found something strange when using NewVector. When I create two vectors in a row:

g := gorgonia.NewGraph()
a := gorgonia.NewVector(g, gorgonia.Float64, gorgonia.WithShape(2))
b := gorgonia.NewVector(g, gorgonia.Float64, gorgonia.WithShape(2), 
    gorgonia.WithInit(gorgonia.Zeroes()))
fmt.Println(a.Value(), b.Value())
gorgonia.Let(a, tensor.New(tensor.WithShape(2), tensor.WithBacking([]float64{1,2})))
fmt.Println(a.Value(), b.Value())

The output indicates that the two vectors share the memory space.

<nil> <nil>
[1  2] [1  2]

However, if I give different names to two vectors:

g := gorgonia.NewGraph()
a := gorgonia.NewVector(g, gorgonia.Float64, gorgonia.WithName("a"), gorgonia.WithShape(2))
b := gorgonia.NewVector(g, gorgonia.Float64, gorgonia.WithName("b"), gorgonia.WithShape(2), 
    gorgonia.WithInit(gorgonia.Zeroes()))
fmt.Println(a.Value(), b.Value())
gorgonia.Let(a, tensor.New(tensor.WithShape(2), tensor.WithBacking([]float64{1,2})))
fmt.Println(a.Value(), b.Value())

They have individual memory spaces.

<nil> [0  0]
[1  2] [0  0]

It seems that:

• They share the memory space if they have the same shape or name.
• Otherwise, they have individual memory spaces.

Is it a bug or something wrong by myself? It's really strange.

The version is:

gorgonia.org/gorgonia v0.9.0-beta.0.20181027224840-11edd62a505a

Thanks a lot :D

[owulveryck]

I will have a closer look, but it looks like that it is a duplicate of #87

[owulveryck]

Closing as this issue is definitely related to issue 87.