Workaround for #810

Author: dcwhite

src/Core/Algorithms/Math/GetMatrixSliceAlgo.cc

@@ -80,7 +80,9 @@ boost::tuple<MatrixHandle, int> GetMatrixSliceAlgo::runImpl(MatrixHandle matrix,
     {
       auto sparse = matrix_cast::as_sparse(matrix);
       if (sparse)
-        return boost::make_tuple(boost::make_shared<SparseRowMatrix>(sparse->col(index)), max);
+      {
+        THROW_ALGORITHM_PROCESSING_ERROR("TODO: need a fix for slicing a column from SparseRowMatrix. Direct Eigen call is buggy. Waiting on an Eigen upgrade");
+      }
       return boost::make_tuple(nullptr, 0);
     }
   }
@@ -89,7 +91,6 @@ boost::tuple<MatrixHandle, int> GetMatrixSliceAlgo::runImpl(MatrixHandle matrix,
     checkIndex(index, matrix->nrows());
     auto max = matrix->nrows() - 1;
 
-    // dense case only now
     auto dense = matrix_cast::as_dense(matrix);
     if (dense)
       return boost::make_tuple(boost::make_shared<DenseMatrix>(dense->row(index)), max);

src/ExampleNets/regression/sliceMatrix.srn5

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
 <!DOCTYPE boost_serialization>
-<boost_serialization signature="serialization::archive" version="10">
+<boost_serialization signature="serialization::archive" version="11">
 <networkFile class_id="0" tracking_level="0" version="2">
 	<networkInfo class_id="1" tracking_level="0" version="0">
 		<modules class_id="2" tracking_level="0" version="0">
@@ -183,7 +183,7 @@
 									<name>IsSliceColumn</name>
 									<value>
 										<which>3</which>
-										<value>1</value>
+										<value>0</value>
 									</value>
 								</second>
 							</item>
@@ -195,7 +195,7 @@
 									<name>MaxIndex</name>
 									<value>
 										<which>0</which>
-										<value>2</value>
+										<value>1</value>
 									</value>
 								</second>
 							</item>
@@ -319,43 +319,43 @@
 		<item class_id="16" tracking_level="0" version="0">
 			<first>ConvertMatrixType:3</first>
 			<second class_id="17" tracking_level="0" version="0">
-				<first>-1672</first>
-				<second>-1216</second>
+				<first>-1.67200000000000000e+003</first>
+				<second>-1.21600000000000000e+003</second>
 			</second>
 		</item>
 		<item>
 			<first>CreateMatrix:2</first>
 			<second>
-				<first>-1900</first>
-				<second>-1368</second>
+				<first>-1.90000000000000000e+003</first>
+				<second>-1.36800000000000000e+003</second>
 			</second>
 		</item>
 		<item>
 			<first>GetMatrixSlice:0</first>
 			<second>
-				<first>-1976</first>
-				<second>-1064</second>
+				<first>-1.97600000000000000e+003</first>
+				<second>-1.06400000000000000e+003</second>
 			</second>
 		</item>
 		<item>
 			<first>GetMatrixSlice:4</first>
 			<second>
-				<first>-1672</first>
-				<second>-1064</second>
+				<first>-1.67200000000000000e+003</first>
+				<second>-1.06400000000000000e+003</second>
 			</second>
 		</item>
 		<item>
 			<first>ReportMatrixInfo:1</first>
 			<second>
-				<first>-1976</first>
-				<second>-912</second>
+				<first>-1.97600000000000000e+003</first>
+				<second>-9.12000000000000000e+002</second>
 			</second>
 		</item>
 		<item>
 			<first>ReportMatrixInfo:5</first>
 			<second>
-				<first>-1672</first>
-				<second>-912</second>
+				<first>-1.67200000000000000e+003</first>
+				<second>-9.12000000000000000e+002</second>
 			</second>
 		</item>
 	</modulePositions>