Draw the elbow curve for the specified scores and values of K.

def draw(self):
        """
        Draw the elbow curve for the specified scores and values of K.
        """
        # Plot the silhouette score against k
        self.ax.plot(self.k_values_, self.k_scores_, marker="D")
        if self.locate_elbow and self.elbow_value_!=None:
            elbow_label = "$elbow\ at\ k={}, score={:0.3f}$".format(self.elbow_value_, self.elbow_score_)
            self.ax.axvline(self.elbow_value_, c=LINE_COLOR, linestyle="--", label=elbow_label)
            
        # If we're going to plot the timings, create a twinx axis
        if self.timings:
            self.axes = [self.ax, self.ax.twinx()]
            self.axes[1].plot(
                self.k_values_, self.k_timers_, label="fit time",
                c='g', marker="o", linestyle="--", alpha=0.75,
            )


        return self.ax