-void histogram_plot(const gsl_histogram *hist,
- const char *factorname,
- const struct normal_curve *norm, short show_normal);
+/* A wrapper aroud histogram_plot.
+ Don't use this function. It's legacy only */
+void histogram_plot_n (const struct histogram *hist,
+ const char *label,
+ double n, double mean, double var,
+ bool show_normal);