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TensorFlow.NET/src/TensorFlowNET.Core/Tensors/Tensor.Index.cs at master · ehtick/TensorFlow.NET · GitHub
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Tensor.Index.cs
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TensorFlow.NET
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TensorFlowNET.Core
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Tensors
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Tensor.Index.cs
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/*****************************************************************************
Copyright 2018 The TensorFlow.NET Authors. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
******************************************************************************/
using
Tensorflow
.
NumPy
;
using
System
;
using
System
.
Collections
.
Generic
;
using
System
.
Linq
;
using
static
Tensorflow
.
Binding
;
namespace
Tensorflow
{
public
partial
class
Tensor
{
public
Tensor
this
[
int
idx
]
=>
slice
(
idx
)
;
public
Tensor
this
[
params
Slice
[
]
slices
]
{
get
{
var
args
=
tensor_util
.
ParseSlices
(
slices
)
;
return
tf_with
(
ops
.
name_scope
(
null
,
"strided_slice"
,
args
)
,
scope
=>
{
string
name
=
scope
;
if
(
args
.
Begin
!=
null
)
{
var
(
packed_begin
,
packed_end
,
packed_strides
)
=
(
array_ops
.
stack
(
args
.
Begin
)
,
array_ops
.
stack
(
args
.
End
)
,
array_ops
.
stack
(
args
.
Strides
)
)
;
return
array_ops
.
strided_slice
(
this
,
packed_begin
,
packed_end
,
packed_strides
,
begin_mask
:
args
.
BeginMask
,
end_mask
:
args
.
EndMask
,
shrink_axis_mask
:
args
.
ShrinkAxisMask
,
new_axis_mask
:
args
.
NewAxisMask
,
ellipsis_mask
:
args
.
EllipsisMask
,
name
:
name
)
;
}
throw
new
NotImplementedException
(
""
)
;
}
)
;
}
}
public
Tensor
this
[
params
string
[
]
slices
]
=>
this
[
slices
.
Select
(
x
=>
new
Slice
(
x
)
)
.
ToArray
(
)
]
;
public
Tensor
slice
(
Slice
slice
)
{
var
slice_spec
=
new
int
[
]
{
slice
.
Start
.
Value
}
;
var
begin
=
new
List
<
int
>
(
)
;
var
end
=
new
List
<
int
>
(
)
;
var
strides
=
new
List
<
int
>
(
)
;
var
index
=
0
;
var
(
new_axis_mask
,
shrink_axis_mask
)
=
(
0
,
0
)
;
var
(
begin_mask
,
end_mask
)
=
(
0
,
0
)
;
var
ellipsis_mask
=
0
;
foreach
(
var
s
in
slice_spec
)
{
begin
.
Add
(
s
)
;
if
(
slice
.
Stop
.
HasValue
)
{
end
.
Add
(
slice
.
Stop
.
Value
)
;
}
else
{
end
.
Add
(
0
)
;
end_mask
|=
(
1
<<
index
)
;
}
strides
.
Add
(
slice
.
Step
)
;
index
+=
1
;
}
return
tf_with
(
ops
.
name_scope
(
null
,
"strided_slice"
,
new
{
begin
,
end
,
strides
}
)
,
scope
=>
{
string
name
=
scope
;
if
(
begin
!=
null
)
{
var
(
packed_begin
,
packed_end
,
packed_strides
)
=
(
array_ops
.
stack
(
begin
.
ToArray
(
)
)
,
array_ops
.
stack
(
end
.
ToArray
(
)
)
,
array_ops
.
stack
(
strides
.
ToArray
(
)
)
)
;
return
gen_array_ops
.
strided_slice
(
this
,
packed_begin
,
packed_end
,
packed_strides
,
begin_mask
:
begin_mask
,
end_mask
:
end_mask
,
shrink_axis_mask
:
shrink_axis_mask
,
new_axis_mask
:
new_axis_mask
,
ellipsis_mask
:
ellipsis_mask
,
name
:
name
)
;
}
throw
new
NotImplementedException
(
""
)
;
}
)
;
}
public
Tensor
this
[
Tensor
start
,
Tensor
stop
=
null
,
Tensor
step
=
null
]
{
get
{
var
args
=
tensor_util
.
ParseSlices
(
start
,
stop
:
stop
,
step
:
step
)
;
return
tf_with
(
ops
.
name_scope
(
null
,
"strided_slice"
,
args
)
,
scope
=>
{
string
name
=
scope
;
var
tensor
=
gen_array_ops
.
strided_slice
(
this
,
args
.
PackedBegin
,
args
.
PackedEnd
,
args
.
PackedStrides
,
begin_mask
:
args
.
BeginMask
,
end_mask
:
args
.
EndMask
,
shrink_axis_mask
:
args
.
ShrinkAxisMask
,
new_axis_mask
:
args
.
NewAxisMask
,
ellipsis_mask
:
args
.
EllipsisMask
,
name
:
name
)
;
tensor
.
OriginalVarSlice
=
args
;
return
tensor
;
}
)
;
}
}
public
Tensor
slice
(
int
start
)
{
var
slice_spec
=
new
int
[
]
{
start
}
;
var
begin
=
new
List
<
int
>
(
)
;
var
end
=
new
List
<
int
>
(
)
;
var
strides
=
new
List
<
int
>
(
)
;
var
index
=
0
;
var
(
new_axis_mask
,
shrink_axis_mask
)
=
(
0
,
0
)
;
var
(
begin_mask
,
end_mask
)
=
(
0
,
0
)
;
var
ellipsis_mask
=
0
;
foreach
(
var
s
in
slice_spec
)
{
begin
.
Add
(
s
)
;
end
.
Add
(
s
+
1
)
;
strides
.
Add
(
1
)
;
shrink_axis_mask
|=
(
1
<<
index
)
;
index
+=
1
;
}
return
tf_with
(
ops
.
name_scope
(
null
,
"strided_slice"
,
new
{
begin
,
end
,
strides
}
)
,
scope
=>
{
string
name
=
scope
;
if
(
begin
!=
null
)
{
var
(
packed_begin
,
packed_end
,
packed_strides
)
=
(
array_ops
.
stack
(
begin
.
ToArray
(
)
)
,
array_ops
.
stack
(
end
.
ToArray
(
)
)
,
array_ops
.
stack
(
strides
.
ToArray
(
)
)
)
;
return
array_ops
.
strided_slice
(
this
,
packed_begin
,
packed_end
,
packed_strides
,
begin_mask
:
begin_mask
,
end_mask
:
end_mask
,
shrink_axis_mask
:
shrink_axis_mask
,
new_axis_mask
:
new_axis_mask
,
ellipsis_mask
:
ellipsis_mask
,
name
:
name
)
;
}
throw
new
NotImplementedException
(
""
)
;
}
)
;
}
}
}
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