vector column added

lib/column_vector.dart

@@ -0,0 +1,27 @@
+import 'package:ml_linalg/matrix.dart';
+import 'package:ml_linalg/src/matrix/float32/float32_column_vector.dart';
+import 'package:ml_linalg/vector.dart';
+
+import 'dtype.dart';
+
+abstract class ColumnVector implements Matrix {
+  factory ColumnVector.fromList(List<double> source,
+      {DType dtype = DType.float32}) {
+    switch (dtype) {
+      case DType.float32:
+        return Float32ColumnVector.fromList(source);
+      default:
+        throw UnimplementedError();
+    }
+  }
+
+  factory ColumnVector.fromVector(Vector source,
+      {DType dtype = DType.float32}) {
+    switch (dtype) {
+      case DType.float32:
+        return Float32ColumnVector.fromVector(source);
+      default:
+        throw UnimplementedError();
+    }
+  }
+}

lib/src/matrix/float32/float32_column_vector.dart

@@ -0,0 +1,14 @@
+import 'package:ml_linalg/column_vector.dart';
+import 'package:ml_linalg/vector.dart';
+
+import 'float32_matrix.dart';
+
+class Float32ColumnVector extends Float32Matrix implements ColumnVector {
+  Float32ColumnVector.fromList(List<double> source) :
+        super.columns([Vector.fromList(source)]);
+
+  Float32ColumnVector.fromVector(Vector source) : super.columns([source]);
+
+  @override
+  final int columnsNum = 1;
+}