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Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You 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.
package org.apache.mahout.math;
public interface VectorIterable extends Iterable<MatrixSlice> {
  int numSlices();
  int numRows();
  int numCols();

  
Return a new vector with cardinality equal to getNumRows() of this matrix which is the matrix product of the recipient and the argument

Parameters:
v a vector with cardinality equal to getNumCols() of the recipient
Returns:
a new vector (typically a DenseVector)
Throws:
CardinalityException if this.getNumRows() != v.size()
  Vector times(Vector v);

  
Convenience method for producing this.transpose().times(this.times(v)), which can be implemented with only one pass over the matrix, without making the transpose() call (which can be expensive if the matrix is sparse)

Parameters:
v a vector with cardinality equal to getNumCols() of the recipient
Returns:
a new vector (typically a DenseVector) with cardinality equal to that of the argument.
Throws:
CardinalityException if this.getNumCols() != v.size()
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