Unidata / MetPy

            V (North-South) component of wind

        c:

            An optional array used to map colors to the barbs

        xloc : float, optional

            Position for the barbs, in normalized axes coordinates, where 0.0

            denotes far left and 1.0 denotes far right. Defaults to far right.

        x_clip_radius : float, optional

            Space, in normalized axes coordinates, to leave before clipping

            wind barbs in the x-direction. Defaults to 0.08.

        y_clip_radius : float, optional

            Space, in normalized axes coordinates, to leave above/below plot

            before clipping wind barbs in the y-direction. Defaults to 0.08.

        kwargs

            Other keyword arguments to pass to :func:`~matplotlib.pyplot.barbs`

        Returns

        -------

        matplotlib.quiver.Barbs

            instance created

        See Also

        --------

        :func:`matplotlib.pyplot.barbs`

        """

        # Assemble array of x-locations in axes space

        x = np.empty_like(p)

        x.fill(xloc)

        # Do barbs plot at this location

        if c is not None:

            b = self.ax.barbs(x, p, u, v, c,

                              transform=self.ax.get_yaxis_transform(which='tick2'),

                              clip_on=True, **kwargs)

        else:

            b = self.ax.barbs(x, p, u, v,

                              transform=self.ax.get_yaxis_transform(which='tick2'),

                              clip_on=True, **kwargs)

        # Override the default clip box, which is the axes rectangle, so we can have

        # barbs that extend outside.

        ax_bbox = transforms.Bbox([[xloc - x_clip_radius, -y_clip_radius],

                                   [xloc + x_clip_radius, 1.0 + y_clip_radius]])

        b.set_clip_box(transforms.TransformedBbox(ax_bbox, self.ax.transAxes))

        return b

    def plot_dry_adiabats(self, t0=None, p=None, **kwargs):

        r"""Plot dry adiabats.

        Adds dry adiabats (lines of constant potential temperature) to the

        plot. The default style of these lines is dashed red lines with an alpha

        value of 0.5. These can be overridden using keyword arguments.

        Parameters

        ----------

        t0 : array_like, optional

            Starting temperature values in Kelvin. If none are given, they will be

            generated using the current temperature range at the bottom of

        p : array_like

            pressure values

        t : array_like

            temperature values, can also be used for things like dew point

        args

            Other positional arguments to pass to :func:`~matplotlib.pyplot.semilogy`

        kwargs

            Other keyword arguments to pass to :func:`~matplotlib.pyplot.semilogy`

        Returns

        -------

        list[matplotlib.lines.Line2D]

            lines plotted

        See Also

        --------

        :func:`matplotlib.pyplot.semilogy`

        """

        # Skew-T logP plotting

        t, p = delete_masked_points(t, p)

        l = self.ax.semilogy(t, p, *args, **kwargs)

        # Disables the log-formatting that comes with semilogy

        self.ax.yaxis.set_major_formatter(ScalarFormatter())

        self.ax.yaxis.set_major_locator(MultipleLocator(100))

        self.ax.yaxis.set_minor_formatter(NullFormatter())

        if not self.ax.yaxis_inverted():

            self.ax.invert_yaxis()

        # Try to make sane default temperature plotting

        self.ax.xaxis.set_major_locator(MultipleLocator(10))

        self.ax.set_xlim(-50, 50)

        return l

    def plot_barbs(self, p, u, v, c=None, xloc=1.0, x_clip_radius=0.08,

                   y_clip_radius=0.08, **kwargs):

        r"""Plot wind barbs.

        Adds wind barbs to the skew-T plot. This is a wrapper around the

        `barbs` command that adds to appropriate transform to place the

        barbs in a vertical line, located as a function of pressure.

        Parameters

        ----------

        p : array_like

            pressure values

        u : array_like

            U (East-West) component of wind

        v : array_like

            V (North-South) component of wind

        c:

            An optional array used to map colors to the barbs

        xloc : float, optional

            Position for the barbs, in normalized axes coordinates, where 0.0