def plot_scatter_pairs(self, idx1, idx2, title=None, ax=None):
        import matplotlib.pyplot as plt
        if ax is None:
            fig = plt.figure()
            ax = fig.add_subplot(1,1,1)
            ax_or_fig = fig

        re1 = self.params_random_units[:,idx1]
        re2 = self.params_random_units[:,idx2]
        ax.plot(re1, re2, 'o', alpha=0.75)
        if title is None:
            title = 'Random Effects %d and %d' % (idx1, idx2)
        ax.set_title(title)
        ax_or_fig = ax

        return ax_or_fig
Decrements the value of a key by `delta`.  If the key does
dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/sandbox/panel/mixed.py/OneWayMixedResults.plot_scatter_pairs--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/appengine-flask-skeleton/lib/werkzeug/contrib/cache.py/BaseCache.dec