#define PLOT_CHART_H
-extern const char *data_colour[];
+extern const char *const data_colour[];
enum tick_orientation {
TICK_ABSCISSA=0,
/* Set the scale for the ordinate */
void chart_write_yscale(struct chart *ch, double smin, double smax, int ticks);
+void chart_write_xlabel(struct chart *ch, const char *label) ;
+
+/* Write the ordinate label */
+void chart_write_ylabel(struct chart *ch, const char *label);
#endif