+
+ /*
+ * All "Back" functions are called, then all "Fore" functions. They add
+ * graphs to a gnuplot "plot" command. All "Options" functions are called.
+ * They can set options via the gnuplot "set" command. Finaly, a replot is
+ * performed. This is done so that options may be set using dynamic
+ * gnuplot variables like GPVAL_X_MIN
+ */
+ /*
+ * These next three functions ("writeTraceTrace...") are for graphs where
+ * both axes are in the scale of timestamps.
+ */