def view_component_planes(self, dimensions=None, figsize=None,
                              colormap=cm.Spectral_r, colorbar=False,
                              bestmatches=False, bestmatchcolors=None,
                              labels=None, zoom=None, filename=None):
        """Observe the component planes in the codebook of the SOM.

        :param dimensions: Optional parameter to specify along which dimension
                           or dimensions should the plotting happen. By
                           default, each dimension is plotted in a sequence of
                           plots.
        :type dimension: int or list of int.
        :param figsize: Optional parameter to specify the size of the figure.
        :type figsize: (int, int)
        :param colormap: Optional parameter to specify the color map to be
                         used.
        :type colormap: matplotlib.colors.Colormap
        :param colorbar: Optional parameter to include a colormap as legend.
        :type colorbar: bool.
        :param bestmatches: Optional parameter to plot best matching units.
        :type bestmatches: bool.
        :param bestmatchcolors: Optional parameter to specify the color of each
                                best matching unit.
        :type bestmatchcolors: list of int.
        :param labels: Optional parameter to specify the label of each point.
        :type labels: list of str.
        :param zoom: Optional parameter to zoom into a region on the map. The
                     first two coordinates of the tuple are the row limits, the
                     second tuple contains the column limits.
        :type zoom: ((int, int), (int, int))
        :param filename: If specified, the plot will not be shown but saved to
                         this file.
        :type filename: str.
        """
        if self.codebook is None:
            raise Exception("The codebook is not available. Either train a map"
                            " or load a codebook from a file")
        if dimensions is None:
            dimensions = range(self.n_dim)
        for i in dimensions:
            plt = self._view_matrix(self.codebook[:, :, i], figsize, colormap,
                                    colorbar, bestmatches, bestmatchcolors,
                                    labels, zoom, filename)
        return plt
Observe the component planes in the codebook of the SOM.

        :param dimensions: Optional parameter to specify along which dimension
                           or dimensions should the plotting happen. By
                           default, each dimension is plotted in a sequence of
                           plots.
        :type dimension: int or list of int.
        :param figsize: Optional parameter to specify the size of the figure.
        :type figsize: (int, int)
        :param colormap: Optional parameter to specify the color map to be
                         used.
        :type colormap: matplotlib.colors.Colormap
        :param colorbar: Optional parameter to include a colormap as legend.
        :type colorbar: bool.
        :param bestmatches: Optional parameter to plot best matching units.
        :type bestmatches: bool.
        :param bestmatchcolors: Optional parameter to specify the color of each
                                best matching unit.
        :type bestmatchcolors: list of int.
        :param labels: Optional parameter to specify the label of each point.
        :type labels: list of str.
        :param zoom: Optional parameter to zoom into a region on the map. The
                     first two coordinates of the tuple are the row limits, the
                     second tuple contains the column limits.
        :type zoom: ((int, int), (int, int))
        :param filename: If specified, the plot will not be shown but saved to
                         this file.
        :type filename: str.