added a static variant of ComputationNode::DataSlice() that takes a l…

…ayout, so that it can be applied to matrices other than m_{function,gradient}Values; conceptually added ability to DataSlices() to pull out one sequence, but not finished since Matrix::RowSlice() does not exist; deleted Win32 entries from VS Solution--again
qingsong99 · Oct 1, 2015 · 2f04535 · 2f04535
1 parent 160e38f
commit 2f04535
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diff --git a/CNTK.sln b/CNTK.sln
@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 2013
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 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "CNTKMathDll", "Math\Math\Math.vcxproj", "{60BDB847-D0C4-4FD3-A947-0C15C08BCDB5}"
 	ProjectSection(ProjectDependencies) = postProject
@@ -336,172 +336,130 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "SequenceTraining", "Machine
 EndProject
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-		{7C4E77C9-6B17-4B02-82C1-DB62EEE2635B} = {D45DF403-6781-444E-B654-A96868C5BE68}
-		{928ABD1B-4D3B-4017-AEF1-0FA1B4467513} = {DD043083-71A4-409A-AA91-F9C548DCF7EC}
-		{DE3C54E5-D7D0-47AF-A783-DFDCE59E7937} = {DD043083-71A4-409A-AA91-F9C548DCF7EC}
-		{5E666C53-2D82-49C9-9127-3FDDC321C741} = {D45DF403-6781-444E-B654-A96868C5BE68}
 		{6D1353D6-F196-466F-B886-F16D48759B20} = {5E666C53-2D82-49C9-9127-3FDDC321C741}
 		{B6725C9F-A6D2-4269-9B74-7888A90F7884} = {5E666C53-2D82-49C9-9127-3FDDC321C741}
 		{B27DD434-EECD-4EE0-A03B-1150EB87258E} = {B6725C9F-A6D2-4269-9B74-7888A90F7884}
 		{A4884465-CFBB-4A64-A9DE-690E1A63EF7E} = {B6725C9F-A6D2-4269-9B74-7888A90F7884}
-		{3E9C89B1-C045-4F42-92B2-F9FFFFC2DBD4} = {39E42C4B-A078-4CA4-9D92-B883D8129601}
-		{C70E1572-20FF-496C-A0A9-10AA6755A07C} = {39E42C4B-A078-4CA4-9D92-B883D8129601}
-		{EAD17188-072C-4726-B840-A769C36DAD1B} = {DD043083-71A4-409A-AA91-F9C548DCF7EC}
 	EndGlobalSection
 EndGlobal
diff --git a/MachineLearning/CNTKComputationNetworkLib/ComputationNode.h b/MachineLearning/CNTKComputationNetworkLib/ComputationNode.h
@@ -1106,21 +1106,40 @@ namespace Microsoft { namespace MSR { namespace CNTK {
         // Note: This is not used anywhere yet, only a sketch how we may further abstract timing.
         Matrix<ElemType> DataSlice(Matrix<ElemType> & data,
                                    const FrameRange & frameRange/*select frame or entire batch*/)
+        {
+            return DataSlice(data, frameRange, m_pMBLayout);
+        }
+        static Matrix<ElemType> DataSlice(Matrix<ElemType> & data,
+                                          const FrameRange & frameRange/*select frame or entire batch*/,
+                                          const MBLayoutPtr & pMBLayout)
         {
             // if FrameRange refers to whole minibatch (map mode)
             // or if we don't even have a layout
             // then return the whole matrix
-            if (!m_pMBLayout || frameRange.IsAllFrames())
+            if (!pMBLayout || frameRange.IsAllFrames())
             {
                 if (frameRange.seqIndex == SIZE_MAX)
                     return data.ColumnSlice(0, data.GetNumCols());
                 else
-                    LogicError("DataSlice: sequence index only supported when accessing individual frame"); // (not needed; doable but more involved, requiring a reshape)
+                {
+                    if (!pMBLayout)
+                        LogicError("DataSlice: Attempting to retrieve a parallel sequence from data without layout.");
+#if 1
+                    else
+                        LogicError("DataSlice: To retrieve a parallel sequence, implement Matrix::RowSlice() first!");
+#else
+                    // get a reshaped view that stacks all sequences into T long vectors
+                    auto mat = data.ColumnSlice(0, data.GetNumCols());
+                    mat.Resize(data.GetNumRows() * pMBLayout->GetNumParallelSequences(), data.GetNumRows() / pMBLayout->GetNumParallelSequences());
+                    return mat;   // .RowSlice(frameRange.seqIndex * data.GetNumRows());
+                    // TODO: Why does RowSlice() not exist? Seems simple. Is there a hidden assumption of contiguous memory?#endif
+#endif
+                }
             }
             // FrameRange refers to a time slice -> return that
             else
             {
-                size_t numParallelSequences = m_pMBLayout->GetNumParallelSequences();
+                size_t numParallelSequences = pMBLayout->GetNumParallelSequences();
                 size_t startColumn = frameRange.t() * numParallelSequences;
                 if (frameRange.seqIndex == SIZE_MAX)
                     return data.ColumnSlice(startColumn, numParallelSequences);