double setcharsize(double size);
double xconv(double x);
double yconv(double y);
int clipt(double d, double n, double *te, double *tl);
int initgraphics(int device);
int lengthpoly(double *x, double *y, int n);
int set_coordmap(int mapx, int mapy);
int setcolor(int col);
int setfont(int f);
int setlinestyle(int style);
int setlinewidth(int wid);
int setpattern(int k);
int symok(double x, double y);
int world2device(double wx, double wy, int *x, int *y);
int world2deviceabs(double wx, double wy, int *x, int *y);
int world2view(double x, double y, double *vx, double *vy);
void defineworld(double x1, double y1, double x2, double y2, int mapx, int mapy);
void device2view(int x, int y, double *vx, double *vy);
void device2world(int x, int y, double *wx, double *wy);
void draw_arrow(double x1, double y1, double x2, double y2, int end, double asize, int type);
void draw_head(int ix1, int iy1, int ix2, int iy2, int sa, int type);
void drawcircle(double xc, double yc, double s, int f);
void drawgrid(int dir, double start, double end, double y1, double y2, double step, int cy, int ly, int wy);
void drawpoly(double *x, double *y, int n);
void drawpolyseg(double *x, double *y, int n);
void drawpolysym(double *x, double *y, int len, int sym, int skip, int fill, double size);
void drawsym(int x, int y, int sym, double size, int fill);
void drawtic(double x, double y, int dir, int axis);
void drawtitle(char *title, int which);
void errorbar(double x, double y, double ebarlen, int xy);
void boxplotsym(double x, double med, double il, double iu, double ol, double ou, double ebarlen);
void fillcolor(int n, double *px, double *py);
void fillpattern(int n, double *px, double *py);
void fillrectcolor(double x1, double y1, double x2, double y2);
void fillrectpat(double x1, double y1, double x2, double y2);
void leavegraphics(void);
void my_backbuffer(int mode);
void my_circle(double xc, double yc, double s);
void my_doublebuffer(int mode);
void my_draw2(double x2, double y2);
void my_filledcircle(double xc, double yc, double s);
void my_frontbuffer(int mode);
void my_move2(double x, double y);
void my_swapbuffer(void);
void openclose(double x, double y1, double y2, double ebarlen, int xy);
void putlegend(int i,		/* which set */
	        int d,		/* flag, 1 = no draw, just compute min/max
				 * for bounding box */
	        int xlen,	/* length of legend */
	        int ylen,	/* distance between entries */
	        double size,	/* symbol size */
	        double x,	/* location x */
	        double y,	/* location y */
	        int sy,		/* symbol */
	        int ly,		/* line style */
	        int cy,		/* line color */
	        int wy,		/* line width */
	        char *s,	/* legend string */
	        int fill,	/* symbol fill */
	        int sc,		/* symbol color */
	        int sw,		/* symbol linewidth */
	        int sl);	/* symbol linestyle */
void putbarlegend(int i,	/* which set */
	        int d,		/* flag, 1 = no draw, just compute min/max
				 * for bounding box */
	        int xlen,	/* length of legend */
	        int ylen,	/* distance between entries */
	        double size,	/* symbol size */
	        double x,	/* location x */
	        double y,	/* location y */
	        int sy,		/* symbol */
	        int ly,		/* line style */
	        int cy,		/* line color */
	        int wy,		/* line width */
	        char *s,	/* legend string */
	        int fill,	/* symbol fill */
	        int fu,		/* fill using pattern or color */
	        int fc,		/* fill color */
	        int fp);	/* fill pattern */
void putlegendrect(int fill, int fillusing, int fillcolor, int fillpat, int cy, int wy, int ly);
void rect(double x1, double y1, double x2, double y2);
void setclipping(int fl);
void setfixedscale(double xv1, double yv1, double xv2, double yv2, double *xg1, double *yg1, double *xg2, double *yg2);
void setticksize(double sizex, double sizey);
void symcircle(int x, int y, double s, int f);
void symdiamond(int x, int y, double s, int f);
void symplus(int x, int y, double s, int f);
void symsplat(int x, int y, double s, int f);
void symsquare(int x, int y, double s, int f);
void symstar(int x, int y, double s, int f);
void symtriangle1(int x, int y, double s, int f);
void symtriangle2(int x, int y, double s, int f);
void symtriangle3(int x, int y, double s, int f);
void symtriangle4(int x, int y, double s, int f);
void symx(int x, int y, double s, int f);
void velplt(double xx, double yy, double u, double v, double vscale, int type);
void view2world(double vx, double vy, double *x, double *y);
void viewport(double x1, double y1, double x2, double y2);
void writestr(double x, double y, int dir, int just, char *s);