code: public static Matrix readMatrix(File matrix, Format format, 
                                      Type matrixType) 
              throws IOException {
          return readMatrix(matrix, format, matrixType, false);
      }
docs: Converts the contents of a matrix file as a {@link Matrix} object, using
  the provided type description as a hint for what kind to create.  The
  type of {@code Matrix} object created will be based on an estimate of
  whether the data will fit into the available memory.  Note that the
  returned {@link Matrix} instance is not backed by the data on file;
  changes to the {@code Matrix} will <i>not</i> be reflected in the
  original file's data.
  
  @param matrix a file contain matrix data
  @param format the format of the file
  @param matrixType the expected type and behavior of the matrix in
  relation to memory.  This value will be used as a hint for what
  kind of {@code Matrix} instance to create
  
  @return the {@code Matrix} instance that contains the data in the
  provided file