aries.

        Returns
        -------
        `matplotlib.collections.Collection`

        Other Parameters
        ----------------
        antialiaseds : bool, default: False
            The default *antialiaseds* is False if the default
            *edgecolors*\ ="none" is used.  This eliminates artificial lines
            at patch boundaries, and works regardless of the value of alpha.
            If *edgecolors* is not "none", then the default *antialiaseds*
            is taken from :rc:`patch.antialiased`.
            Stroking the edges may be preferred if *alpha* is 1, but will
            cause artifacts otherwise.

        data : indexable object, optional
            DATA_PARAMETER_PLACEHOLDER

        **kwargs
            Additionally, the following arguments are allowed. They are passed
            along to the `~matplotlib.collections.PolyCollection` constructor:

        %(PolyCollection:kwdoc)s

        See Also
        --------
        pcolormesh : for an explanation of the differences between
            pcolor and pcolormesh.
        imshow : If *X* and *Y* are each equidistant, `~.Axes.imshow` can be a
            faster alternative.

        Notes
        -----
        **Masked arrays**

        *X*, *Y* and *C* may be masked arrays. If either ``C[i, j]``, or one
        of the vertices surrounding ``C[i, j]`` (*X* or *Y* at
        ``[i, j], [i+1, j], [i, j+1], [i+1, j+1]``) is masked, nothing is
        plotted.

        .. _axes-pcolor-grid-orientation:

        **Grid orientation**

        The grid orientation follows the standard matrix convention: An array
        *C* with shape (nrows, ncolumns) is plotted with the column number as
        *X* and the row number as *Y*.
        Núpcolor.shadingÚ