def _plot(X_inliers, X_outliers, inlier_color='blue',
              outlier_color='orange'):
        """Internal method to add subplot of inliers and outliers.

        Parameters
        ----------
        X_inliers : numpy array of shape (n_samples, n_features)
            Outliers.

        X_outliers : numpy array of shape (n_samples, n_features)
            Inliers.

        sub_plot_title : str
            Subplot title.

        inlier_color : str, optional (default='blue')
            The color of inliers.

        outlier_color : str, optional (default='orange')
            The color of outliers.

        """
        plt.axis("equal")
        plt.scatter(X_inliers[:, 0], X_inliers[:, 1], label='inliers',
                    color=inlier_color, s=40)
        plt.scatter(X_outliers[:, 0], X_outliers[:, 1],
                    label='outliers', color=outlier_color, s=50, marker='^')
        plt.xticks([])
        plt.yticks([])
        plt.legend(loc='best', prop={'size': 10})
Internal method to add subplot of inliers and outliers.

        Parameters
        ----------
        X_inliers : numpy array of shape (n_samples, n_features)
            Outliers.

        X_outliers : numpy array of shape (n_samples, n_features)
            Inliers.

        sub_plot_title : str
            Subplot title.

        inlier_color : str, optional (default='blue')
            The color of inliers.

        outlier_color : str, optional (default='orange')
            The color of outliers.

        
pyod/utils/example.py