/*plot master routine to generate some sort of plot */
void plot(char *chCall);

/* limit to the number of plots we can store at one time */
#define	NDPLOT	10L

EXTERN struct t_plotCom {

	/* which type of plot */
	char chPType[NDPLOT][5];

	/*lgPlotON is flag set when plot turned on */
	int lgPlotON;

	float pltxmn[NDPLOT], 
	  pltxmx[NDPLOT];

	/* number of plots */
	long int nplot;

	/* flag set with plot trace command  */
	int lgPltTrace[NDPLOT];
	}	plotCom;