Пример #1
0
void do_ss_frame(Widget w, XtPointer client_data, XtPointer call_data)
/* 
 * Gte the selected set and call the routine to open up an Xbae widget 
 */
{
    EditPoints *ep;
    int gno = cg;
    int setno = GetSelectedSet(editp_set_item);
    if (setno == SET_SELECT_ERROR) {
        errwin("No set selected");
        return;
    }
	if( setno == SET_SELECT_NEXT ) {
		if( (setno=nextset(gno)) != -1 ) { 
			add_point(gno, setno, 0., 0., 0, 0, SET_XY);
			add_point(gno, setno, 1, 1, 0, 0, SET_XY);
			setcomment( gno, setno, "editor" );
			update_set_status( gno, setno );
		} else {
       		 errwin("No set selected");
       		 return;
    	}
	}
    if (isactive_set(gno, setno)) {
		if (((ep = (EditPoints *) geteditpoints(gno, setno)) != NULL)
												 && (ep->top != NULL)) {
			XtRaise(ep->top);
		} else {
			ep = newep(gno, setno);
			create_ss_frame(ep);
		}
    } else {
		errwin("Set not active");
    }
}
Пример #2
0
/*
 * Start up editor using GR_EDITOR variable
 * Note the change to the GR_EDITOR variable: If it requires a text 
 * terminal it must provide it explicitly with an xterm -e prefix 
 */
void do_ext_editor(Widget w, XtPointer client_data, XtPointer call_data)
{
    char buf[256], tbuf[256], *fname, *mktemp(char *);
    char ebuf[256], *s;
    int setno = GetSelectedSet(editp_set_item), curgraph=cg;
    if (setno == SET_SELECT_ERROR) {
        errwin("No set selected");
        return;
    }

    strcpy(tbuf, "/tmp/xmgrXXXXXX");
    fname = mktemp(tbuf);

	if( setno == SET_SELECT_NEXT ){ 
		if( (setno=nextset(curgraph)) == -1 ){ 
        	errwin("Not enough sets");
       	 	return;
    	}
		activateset( curgraph, setno );
		do_writesets(curgraph, setno, 0, fname, sformat);
	} else
		do_writesets(curgraph, setno, 0, fname, sformat);

    if ((s = getenv("GR_EDITOR")) != NULL) {
    	strcpy(ebuf, s);
    } else {
    	strcpy(ebuf, "xterm -e vi");
    }
    sprintf(buf, "%s %s", ebuf, fname);
    system(buf);
    if( isactive_set( curgraph, setno ) ) {
		softkillset( curgraph, setno );	
        getdata(curgraph, fname, SOURCE_DISK, dataset_type( curgraph, setno ) );
	} else {
		setcomment( curgraph, setno, "editor" );
        getdata(curgraph, fname, SOURCE_DISK, SET_XY );
	}
    sprintf(buf, "rm %s", fname);
    system(buf);
	update_all( curgraph );
	doforce_redraw();
}
Пример #3
0
static void eblock_accept_notify_proc(Widget, XtPointer, XtPointer)
{
    int i = 0;
    char buf[256];
    int setno, graphno;
    int cx, cy, c1 = 0, c2 = 0, c3 = 0, c4 = 0; //d1,
    double *tx, *ty, *t2, *t3, *t4, *t5;

    //d1 = (int) GetChoice(eblock_type_choice_item);
    cx = (int)GetChoice(eblock_x_choice_item) - 1;
    cy = (int)GetChoice(eblock_y_choice_item);
    if (cx >= 0 && cx >= blockncols)
    {
        errwin("Column for X exceeds the number of columns in block data");
        return;
    }
    if (cy >= blockncols)
    {
        errwin("Column for Y exceeds the number of columns in block data");
        return;
    }
    switch (block_curtype)
    {
    case XY:
        break;
    case XYRT:
    case XYDX:
    case XYDY:
    case XYZ:
        c1 = (int)GetChoice(eblock_e1_choice_item);
        if (c1 >= blockncols)
        {
            errwin("Column for E1 exceeds the number of columns in block data");
            return;
        }
        break;
    case XYDXDX:
    case XYDYDY:
    case XYDXDY:
        c1 = (int)GetChoice(eblock_e1_choice_item);
        c2 = (int)GetChoice(eblock_e2_choice_item);
        if (c1 >= blockncols)
        {
            errwin("Column for E1 exceeds the number of columns in block data");
            return;
        }
        if (c2 >= blockncols)
        {
            errwin("Column for E2 exceeds the number of columns in block data");
            return;
        }
        break;
    case XYHILO:
    case XYBOX:
        c1 = (int)GetChoice(eblock_e1_choice_item);
        c2 = (int)GetChoice(eblock_e2_choice_item);
        c3 = (int)GetChoice(eblock_e3_choice_item);
        if (c1 >= blockncols)
        {
            errwin("Column for E1 exceeds the number of columns in block data");
            return;
        }
        if (c2 >= blockncols)
        {
            errwin("Column for E2 exceeds the number of columns in block data");
            return;
        }
        if (c3 >= blockncols)
        {
            errwin("Column for E3 exceeds the number of columns in block data");
            return;
        }
        break;
    case XYBOXPLOT:
        c1 = (int)GetChoice(eblock_e1_choice_item);
        c2 = (int)GetChoice(eblock_e2_choice_item);
        c3 = (int)GetChoice(eblock_e3_choice_item);
        c4 = (int)GetChoice(eblock_e4_choice_item);
        if (c1 >= blockncols)
        {
            errwin("Column for E1 exceeds the number of columns in block data");
            return;
        }
        if (c2 >= blockncols)
        {
            errwin("Column for E2 exceeds the number of columns in block data");
            return;
        }
        if (c3 >= blockncols)
        {
            errwin("Column for E3 exceeds the number of columns in block data");
            return;
        }
        if (c4 >= blockncols)
        {
            errwin("Column for E4 exceeds the number of columns in block data");
            return;
        }
    }
    setno = -1;
    graphno = (int)GetChoice(eblock_graph_choice_item) - 1;

    if (graphno == -1)
    {
        graphno = cg;
    }
    if (setno == -1)
    {
        setno = nextset(graphno);
    }
    if (setno == -1)
    {
        return;
    }
    if (g[graphno].active == OFF)
    {
        set_graph_active(graphno);
    }
    activateset(graphno, setno);
    settype(graphno, setno, block_curtype);

    tx = (double *)calloc(blocklen, sizeof(double));
    if (tx == NULL)
    {
        errwin("Can't allocate memory for X");
        return;
    }
    ty = (double *)calloc(blocklen, sizeof(double));
    if (ty == NULL)
    {
        cfree(tx);
        errwin("Can't allocate memory for Y");
        return;
    }
    for (i = 0; i < blocklen; i++)
    {
        if (cx == -1)
        {
            tx[i] = i + 1;
        }
        else
        {
            tx[i] = blockdata[cx][i];
        }
        ty[i] = blockdata[cy][i];
    }
    setcol(graphno, tx, setno, blocklen, 0);
    setcol(graphno, ty, setno, blocklen, 1);

    switch (block_curtype)
    {
    case XY:
        sprintf(buf, "Cols %d %d", cx + 1, cy + 1);
        break;
    case XYRT:
    case XYDX:
    case XYDY:
    case XYZ:
        sprintf(buf, "Cols %d %d %d", cx + 1, cy + 1, c1 + 1);
        t2 = (double *)calloc(blocklen, sizeof(double));
        for (i = 0; i < blocklen; i++)
        {
            t2[i] = blockdata[c1][i];
        }
        setcol(graphno, t2, setno, blocklen, 2);
        break;
    case XYDXDX:
    case XYDYDY:
    case XYDXDY:
        sprintf(buf, "Cols %d %d %d %d", cx + 1, cy + 1, c1 + 1, c2 + 1);
        t2 = (double *)calloc(blocklen, sizeof(double));
        t3 = (double *)calloc(blocklen, sizeof(double));
        for (i = 0; i < blocklen; i++)
        {
            t2[i] = blockdata[c1][i];
            t3[i] = blockdata[c2][i];
        }
        setcol(graphno, t2, setno, blocklen, 2);
        setcol(graphno, t3, setno, blocklen, 3);
        break;
    case XYHILO:
    case XYBOX:
        sprintf(buf, "Cols %d %d %d %d %d", cx + 1, cy + 1, c1 + 1, c2 + 1, c3 + 1);
        t2 = (double *)calloc(blocklen, sizeof(double));
        t3 = (double *)calloc(blocklen, sizeof(double));
        t4 = (double *)calloc(blocklen, sizeof(double));
        for (i = 0; i < blocklen; i++)
        {
            t2[i] = blockdata[c1][i];
            t3[i] = blockdata[c2][i];
            t4[i] = blockdata[c3][i];
        }
        setcol(graphno, t2, setno, blocklen, 2);
        setcol(graphno, t3, setno, blocklen, 3);
        setcol(graphno, t4, setno, blocklen, 4);
        break;
    case XYBOXPLOT:
        sprintf(buf, "Cols %d %d %d %d %d %d", cx + 1, cy + 1, c1 + 1, c2 + 1, c3 + 1, c4 + 1);
        t2 = (double *)calloc(blocklen, sizeof(double));
        t3 = (double *)calloc(blocklen, sizeof(double));
        t4 = (double *)calloc(blocklen, sizeof(double));
        t5 = (double *)calloc(blocklen, sizeof(double));
        for (i = 0; i < blocklen; i++)
        {
            t2[i] = blockdata[c1][i];
            t3[i] = blockdata[c2][i];
            t4[i] = blockdata[c3][i];
            t5[i] = blockdata[c4][i];
        }
        setcol(graphno, t2, setno, blocklen, 2);
        setcol(graphno, t3, setno, blocklen, 3);
        setcol(graphno, t4, setno, blocklen, 4);
        setcol(graphno, t5, setno, blocklen, 5);
        break;
    }

    setcomment(graphno, setno, buf);
    updatesetminmax(graphno, setno);
    update_status_popup(NULL, NULL, NULL);
    drawgraph();
}
Пример #4
0
/* ARGSUSED */
static void do_nonl_proc(Widget, XtPointer, XtPointer)
{
    int i, setno, loadset, loadto, graphto, npar, info;
    double tol, a[MAXPARM];
    char fstr[256];
    double *y, *yp;

    set_wait_cursor();
    curset = setno = (int)GetChoice(nonl_set_item);
    loadto = (int)GetChoice(nonl_load_item);
    graphto = (int)GetChoice(nonl_loadgraph_item) - 1;
    tol = atof((char *)xv_getstr(nonl_tol_item));
    if (graphto < 0)
    {
        graphto = cg;
    }
    npar = atoi((char *)xv_getstr(nonl_nparm_item));
    strcpy(fstr, (char *)xv_getstr(nonl_formula_item));
    for (i = 0; i < MAXPARM; i++)
    {
        a[i] = 0.0;
        strcpy(buf, (char *)xv_getstr(nonl_initial_item[i]));
        sscanf(buf, "%lf", &a[i]);
    }
    yp = (double *)calloc(getsetlength(cg, setno), sizeof(double));
    if (yp == NULL)
    {
        errwin("Memory allocation error, operation cancelled");
        unset_wait_cursor();
        return;
    }
    y = gety(cg, setno);
    for (i = 0; i < getsetlength(cg, setno); i++)
    {
        yp[i] = y[i];
    }
    sprintf(buf, "Fitting: %s\n", fstr);
    stufftext(buf, 0);
    sprintf(buf, "Initial guess:\n");
    stufftext(buf, 0);
    for (i = 0; i < npar; i++)
    {
        sprintf(buf, "\ta%1d = %.9lf\n", i, a[i]);
        stufftext(buf, 0);
    }
    sprintf(buf, "Tolerance = %.9lf\n", tol);
    stufftext(buf, 0);
    lmfit(fstr, getsetlength(cg, setno), getx(cg, setno),
          yp, y, npar, a, tol, &info);
    for (i = 0; i < getsetlength(cg, setno); i++)
    {
        y[i] = yp[i];
    }
    free(yp);
    for (i = 0; i < MAXPARM; i++)
    {
        sprintf(buf, "%.9lf", a[i]);
        xv_setstr(nonl_computed_item[i], buf);
        nonl_parms[i] = a[i];
    }
    if (info > 0 && info < 4)
    {
        sprintf(buf, "Computed values:\n");
        stufftext(buf, 0);
        for (i = 0; i < npar; i++)
        {
            sprintf(buf, "\ta%1d = %.9lf\n", i, a[i]);
            stufftext(buf, 0);
        }
        loadset = nextset(cg);
        if (loadset != -1)
        {
            do_copyset(cg, setno, cg, loadset);
        }
        else
        {
            unset_wait_cursor();
            return;
        }
        switch (loadto)
        {
        case 0:
            sprintf(buf, "Evaluating function and loading result to set %d:\n", loadset);
            stufftext(buf, 0);
            do_compute(loadset, 0, graphto, fstr);
            break;
        case 1:
            sprintf(buf, "Evaluating function and loading residuals to set %d:\n", loadset);
            stufftext(buf, 0);
            do_compute(loadset, 0, graphto, fstr);
            break;
        case 2:
            sprintf(buf, "Computed function not evaluated\n");
            stufftext(buf, 0);
            break;
        }
    }
    /*
       if (info >= 4) {
      do_compute(setno, 1, graphto, fstr);
       }
   */
    if (info >= 0 && info <= 7)
    {
        char *s;
        switch (info)
        {
        case 0:
            s = (char *)"Improper input parameters.\n";
            break;
        case 1:
            s = (char *)"Relative error in the sum of squares is at most tol.\n";
            break;
        case 2:
            s = (char *)"Relative error between A and the solution is at most tol.\n";
            break;
        case 3:
            s = (char *)"Relative error in the sum of squares and A and the solution is at most tol.\n";
            break;
        case 4:
            s = (char *)"Fvec is orthogonal to the columns of the jacobian to machine precision.\n";
            break;
        case 5:
            s = (char *)"Number of calls to fcn has reached or exceeded 200*(n+1).\n";
            break;
        case 6:
            s = (char *)"Tol is too small. No further reduction in the sum of squares is possible.\n";
            break;
        case 7:
            s = (char *)"Tol is too small. No further improvement in the approximate solution A is possible.\n";
            break;
        }
        stufftext(s, 0);
        stufftext((char *)"\n", 0);
    }
    unset_wait_cursor();
}
Пример #5
0
/* ARGSUSED */
static void do_nonl_proc(Widget w, XtPointer client_data, XtPointer call_data)
{
    int i, npts = 0, info;
    double delx, *xfit, *y, *yfit;
    int nsteps = (int) client_data;
    
    set_wait_cursor();
    curset = nlsetno = GetSelectedSet(nonl_set_item);
    if (curset == SET_SELECT_ERROR) {
    	errmsg("No set selected");
    	unset_wait_cursor();
    	return;
    }
    
    nonl_opts.tolerance = atof((char *) xv_getstr(nonl_tol_item));
    nonl_opts.parnum = GetChoice(nonl_nparm_item);
    strcpy(nonl_opts.formula, (char *) xv_getstr(nonl_formula_item));
    for (i = 0; i < nonl_opts.parnum; i++) {
	strcpy(buf, (char *) xv_getstr(nonl_value_item[i]));
	if (sscanf(buf, "%lf", &nonl_parms[i].value) != 1) {
	    errmsg("Invalid input in parameter field");
	    unset_wait_cursor();
	    return;
	}
	
	nonl_parms[i].constr = XmToggleButtonGetState(nonl_constr_item[i]);
	if (nonl_parms[i].constr) {
	    strcpy(buf, (char *) xv_getstr(nonl_lowb_item[i]));
	    if (sscanf(buf, "%lf", &nonl_parms[i].min) != 1) {
	    	errmsg("Invalid input in low-bound field");
	    	unset_wait_cursor();
	    	return;
	    }
	    strcpy(buf, (char *) xv_getstr(nonl_uppb_item[i]));
	    if (sscanf(buf, "%lf", &nonl_parms[i].max) != 1) {
	    	errmsg("Invalid input in upper-bound field");
	    	unset_wait_cursor();
	    	return;
	    }
	    if ((nonl_parms[i].value < nonl_parms[i].min) || (nonl_parms[i].value > nonl_parms[i].max)) {
	    	errmsg("Initial values must be within bounds");
	    	unset_wait_cursor();
	    	return;
	    }
	}
    }
    
    nonl_prefs.autoload = XmToggleButtonGetState(nonl_autol_item);
    for (i = 0; i < 3; i++) {
        if (XmToggleButtonGetState(nonl_load_item[i])) {
            nonl_prefs.load = i;
            break;
        }
    }
    
    if (nonl_prefs.load == LOAD_FUNCTION) {
        strcpy(buf, (char *) xv_getstr(nonl_start_item));
	if (sscanf(buf, "%lf", &nonl_prefs.start) != 1) {
	    errmsg("Invalid input in start field");
	    unset_wait_cursor();
	    return;
	}
	strcpy(buf, (char *) xv_getstr(nonl_stop_item));
	if (sscanf(buf, "%lf", &nonl_prefs.stop) != 1) {
	    errmsg("Invalid input in stop field");
	    unset_wait_cursor();
	    return;
	}
	strcpy(buf, (char *) xv_getstr(nonl_npts_item));
	if (sscanf(buf, "%d", &nonl_prefs.npoints) != 1) {
	    errmsg("Invalid input in start field");
	    unset_wait_cursor();
	    return;
	}
    }
    
    if (nsteps) { /* we are asked to fit */
    	sprintf(buf, "Fitting with formula: %s\n", nonl_opts.formula);
    	stufftext(buf, 0);
    	sprintf(buf, "Initial guesses:\n");
    	stufftext(buf, 0);
    	for (i = 0; i < nonl_opts.parnum; i++) {
	    sprintf(buf, "\ta%1d = %g\n", i, nonl_parms[i].value);
	    stufftext(buf, 0);
    	}
    	sprintf(buf, "Tolerance = %g\n", nonl_opts.tolerance);
    	stufftext(buf, 0);

/*
 * The fit itself!
 */    	

    	info = do_nonlfit(cg, nlsetno, nsteps);
    	if (info == -1) {
	    errmsg("Memory allocation error in do_nonlfit()");  
	    unset_wait_cursor();
	    return;  	
    	}
   	    	
    	for (i = 0; i < nonl_opts.parnum; i++) {
	    sprintf(buf, "%g", nonl_parms[i].value);
	    xv_setstr(nonl_value_item[i], buf);
    	}

    	if ((info > 0 && info < 4) || (info == 5)) {
	    sprintf(buf, "Computed values:\n");
	    stufftext(buf, 0);
	    for (i = 0; i < nonl_opts.parnum; i++) {
		sprintf(buf, "\ta%1d = %g\n", i, nonl_parms[i].value);
		stufftext(buf, 0);
	    }
    	}


    	if (info >= 0 && info <= 7) {
    	    char *s;
    	    switch (info) {
    	    case 0:
    		s = "Improper input parameters.\n";
    		break;
    	    case 1:
    		s = "Relative error in the sum of squares is at most tol.\n";
    		break;
    	    case 2:
    		s = "Relative error between A and the solution is at most tol.\n";
    		break;
    	    case 3:
    		s = "Relative error in the sum of squares and A and the solution is at most tol.\n";
    		break;
    	    case 4:
    		s = "Fvec is orthogonal to the columns of the jacobian to machine precision.\n";
    		break;
    	    case 5:
    		s = "\n";
    		break;
    	    case 6:
    		s = "Tol is too small. No further reduction in the sum of squares is possible.\n";
    		break;
    	    case 7:
    		s = "Tol is too small. No further improvement in the approximate solution A is possible.\n";
    		break;
    	    default:
    		s = "\n";
    		errmsg("Internal error in do_nonl_proc(), please report");
    		break;
    	    }
    	    stufftext(s, 0);
    	    stufftext("\n", 0);
    	}
    } /* endif (nsteps) */

/*
 * Select & activate a set to load results to
 */    
    if (!nsteps || nonl_prefs.autoload) {
    	/* check if the set is already allocated */
    	if ((nlloadset == -1) || (nlloadset == nlsetno) || !getsetlength(cg, nlloadset)) {
    	    nlloadset = nextset(cg);
    	    if (nlloadset == -1) {
    	      errmsg("No more sets!");
    	      unset_wait_cursor();
    	      return;
    	    } else {
    		activateset(cg, nlloadset);
    		setlength(cg, nlloadset, 1);
    	    }
    	}
    	    	
    	switch (nonl_prefs.load) {
    	case LOAD_VALUES:
    	  sprintf(buf, "Evaluating fitted values and loading result to set %d:\n", nlloadset);
    	  stufftext(buf, 0);
    	  npts = getsetlength(cg, nlsetno);
    	  setlength(cg, nlloadset, npts);
    	  copycol2(cg, nlsetno, cg, nlloadset, 0);
    	  break;
    	case LOAD_RESIDUALS:
    	  sprintf(buf, "Evaluating fitted values and loading residuals to set %d:\n", nlloadset);
    	  stufftext(buf, 0);
    	  npts = getsetlength(cg, nlsetno);
    	  setlength(cg, nlloadset, npts);
    	  copycol2(cg, nlsetno, cg, nlloadset, 0);
    	  break;
    	case LOAD_FUNCTION:
    	  sprintf(buf, "Computing fitting function and loading result to set %d:\n", nlloadset);
    	  stufftext(buf, 0);
    	  
    	  npts  = nonl_prefs.npoints;
    	  if (npts <= 1) {
    	      errmsg("Number of points must be > 1");
    	      unset_wait_cursor();
    	      return;
    	  }
    	  
    	  setlength(cg, nlloadset, npts);
    	  
    	  delx = (nonl_prefs.stop - nonl_prefs.start)/(npts - 1);
    	  xfit = getx(cg, nlloadset);
	  for (i = 0; i < npts; i++) {
	      xfit[i] = nonl_prefs.start + i * delx;
	  }
    	  break;
    	}
    	
    	setcomment(cg, nlloadset, nonl_opts.formula);
    	
    	do_compute(nlloadset, 0, cg, nonl_opts.formula);
    	
    	if (nonl_prefs.load == LOAD_RESIDUALS) { /* load residuals */
    	    y = gety(cg, nlsetno);
    	    yfit = gety(cg, nlloadset);
    	    for (i = 0; i < npts; i++) {
	      yfit[i] -= y[i];
	    }
    	}
    	
    	update_set_lists(cg);
    	drawgraph();
    }
    unset_wait_cursor();
}
Пример #6
0
void fext_routine( int gto, int feature, int abs_src, int abs_set, int abs_graph )
{
	int i, cs, ns, fts, ncurves, extract_err;
	double datum, dummy, *absy;
	double y1, y2;
	int iy1, iy2;
	char tbuf[1024];
	float *abscissa;

	abscissa = (float *)malloc( maxplot*sizeof(float) );
	
	if( !isactive_graph( gto )	){
		errwin("Graph for results must be active");
	    return;
	}
	if( (ns=nextset( gto ) )== -1 ) {
		errwin("Choose a new graph or kill sets!");
	    return;
	}
	ncurves = nactive(cg);
	switch( abs_src ) {
		case 0:		/* use index */
			for( i=0; i<ncurves; i++ )
				abscissa[i] = i+1;
			break;	
		case 1:		/* use legend label */
			cs = 0;
			for( i=0; i<ncurves; i++ ){
				while( !isactive_set( cg, cs ) )
					cs++;
				if(!sscanf( g[cg].p[cs].lstr, "%f", &abscissa[i]))
					break;
				cs++;
			}
			if( i != ncurves ) {
				errwin("Bad legend label");
				return;
			}
			break;
		case 2:		/* use X from set */
			if( !isactive_set( abs_graph, abs_set ) ){
	    		errwin("Abscissa set not active");
	    		return;
			}
			if( getsetlength( abs_graph, abs_set ) < ncurves ) {
				errwin("Not enough points in set");
				return;
			}
			absy = getx( abs_graph, abs_set );
			for( i=0; i<ncurves; i++ )
				abscissa[i] = absy[i];
			break;			
		case 3:										/* use Y from set */
			if( !isactive_set( abs_graph, abs_set ) ){
	    		errwin("Abscissa set not active");
	    		return;
			}
			if( getsetlength( abs_graph, abs_set ) < ncurves ) {
				errwin("Not enough points in set");
				return;
			}
			absy = gety( abs_graph, abs_set );
			for( i=0; i<ncurves; i++ )
				abscissa[i] = absy[i];
			break;
	}

	cs = 0;
	tbuf[0] = '\0';
	for( i=0; i<ncurves; i++ ) {
		while( !isactive_set( cg, cs ) )
			cs++;
		extract_err = 0;
			
		switch( feature ) {
			case 0:			/* Y minimum */
				datum = g[cg].p[cs].ymin;		
				break;
			case 1: 		/* Y maximum */
				datum = g[cg].p[cs].ymax;		
				break;
			case 2: 		/* Y mean    */
				stasum(gety(cg, cs), getsetlength(cg, cs), &datum, &dummy, 0);
				break;
			case 3:			/* Y std dev */
				stasum(gety(cg, cs), getsetlength(cg, cs), &dummy, &datum, 0);
				break;
			case 4: 		/* Y median  */
				getmedian( cg, cs, DATA_Y, &datum );
				break;
			case 5:			/* X minimum */
				datum = g[cg].p[cs].xmin;		
				break;
			case 6: 		/* X maximum */
				datum = g[cg].p[cs].xmax;		
				break;
			case 7: 		/* X mean    */
				stasum(getx(cg, cs), getsetlength(cg, cs), &datum, &dummy, 0);
				break;
			case 8:			/* X std dev */
				stasum(getx(cg, cs), getsetlength(cg, cs), &dummy, &datum, 0);
				break;
			case 9:			/* X median  */
				getmedian( cg, cs, DATA_X, &datum );
				break;
			case 10: 		/* frequency and period */
			case 11:
				if ( ilog2(getsetlength(cg, cs)) <= 0)    /* only DFT */
					do_fourier(0, cs, 0, 1, 0, 0, 0);
				else							/* FFT      */
					do_fourier(1, cs, 0, 1, 0, 0, 0);

				sprintf( tbuf, "FT of set %d", cs );
				fts = 0;
				while( strcmp( tbuf, g[cg].p[fts].comments+1 ) )
					fts++;
					
				minmax(gety(cg, fts), getsetlength(cg, fts),&y1,&y2,&iy1,&iy2);
				if( feature == 8 )
					datum = g[cg].p[fts].ex[0][iy2-1];
				else
					datum = 1./g[cg].p[fts].ex[0][iy2-1];
				killset( cg, fts );				/* get rid of Fourier set */
				break;
			case 12:		/* first zero crossing */
				if( get_zero_crossing( getsetlength( cg, cs ), 
									getx( cg, cs ),gety( cg, cs ), &datum ) ){
					sprintf( tbuf+strlen(tbuf), 
								"Unable to find zero crossing of set %d\n", cs );
					errwin( tbuf );
					extract_err = 1;
				}
				break;
			case 13:		/* rise time   */
				if( get_rise_time( getsetlength(cg,cs), getx(cg,cs), 
					gety(cg,cs), g[cg].p[cs].ymin, g[cg].p[cs].ymax, &datum ) ){
					sprintf( tbuf+strlen(tbuf), 
							"Unable to find rise time of set %d\n", cs );
					errwin( tbuf );
					extract_err = 1;
				}
				break;
			case 14: 		/* fall time   */
				if( get_fall_time( getsetlength(cg,cs), getx(cg,cs), 
					gety(cg,cs), g[cg].p[cs].ymin, g[cg].p[cs].ymax, &datum ) ){
					sprintf( tbuf+strlen(tbuf), 
									"Unable to find fall time of set %d\n", cs );
					extract_err = 1;
					errwin( tbuf );
				}
				break;
			case 15:		/* slope       */
				if( mute_linear_regression( getsetlength( cg, cs ), 
					getx( cg, cs ),gety( cg, cs ), &datum, &dummy ) ) {
					sprintf( tbuf+strlen(tbuf), 
										"Unable to find slope of set %d\n", cs );
					errwin( tbuf );
					extract_err = 1;
				}
				break;
			case 16:		/* Y intercept */
				if( mute_linear_regression( getsetlength( cg, cs ), 
						getx( cg, cs ), gety( cg, cs ), &dummy, &datum ) ) {
					sprintf( tbuf+strlen(tbuf), 
						"Unable to find y-intercept of set %d\n", cs );
					errwin( tbuf );
					extract_err = 1;
				}
				break;
			case 17:		/* set length  */
				datum = getsetlength( cg, cs );
				break;
			case 18:		/* half maximal widths */
				if( get_half_max_width(getsetlength( cg, cs ), getx(cg,cs), 
					   gety(cg,cs), g[cg].p[cs].ymin, g[cg].p[cs].ymax,&datum) ) {
					sprintf( tbuf+strlen(tbuf), 
						"Unable to find half maximal width of set %d\n", cs );
					extract_err = 1;
					errwin( tbuf );
				}
				break;
			case 19:		/* Barycenter X */
				get_barycenter( getsetlength( cg, cs ), gety(cg,cs), 
									getx(cg,cs), &datum );
				break;
			case 20:		/* Barycenter Y */
				get_barycenter( getsetlength( cg, cs ), getx(cg,cs), 
									gety(cg,cs), &datum );
				break;
			case 21:		/* X of Maximum Y */
				get_max_pos( gety(cg, cs), getx( cg, cs ),
							getsetlength( cg, cs ), g[cg].p[cs].ymax, &datum ); 
				break;
			case 22:		/* Y of Maximum X */
				get_max_pos( getx(cg, cs), gety( cg, cs ),
							getsetlength( cg, cs ), g[cg].p[cs].xmax, &datum ); 
				break;
		}
		if( !extract_err )
			add_point( gto, ns, abscissa[i], datum, 0, 0, SET_XY );
		cs++;
	}

	/* set comment */	
	switch( feature ) {
		case 0:			/* Y minimum */
			sprintf(tbuf,"Y minima of graph %d",cg); 
			break;
		case 1: 		/* Y maximum */
			sprintf(tbuf,"Y maxima of graph %d",cg);
			break;
		case 2: 		/* Y mean    */
			sprintf(tbuf,"Y means of graph %d",cg);
			break;
		case 3:			/* Y std dev */
			sprintf(tbuf,"Y std. dev.'s of graph %d",cg);
			break;
		case 4:			/* Y median  */
			sprintf(tbuf,"Y medians of graph %d",cg);
			break;
		case 5:			/* X minimum */
			sprintf(tbuf,"X minima of graph %d",cg); 
			break;
		case 6: 		/* X maximum */
			sprintf(tbuf,"X maxima of graph %d",cg);
			break;
		case 7: 		/* X mean    */
			sprintf(tbuf,"X means of graph %d",cg);
			break;
		case 8:			/* X std dev */
			sprintf(tbuf,"X std. dev.'s of graph %d",cg);
			break;
		case 9:			/* X median  */
			sprintf(tbuf,"X medians of graph %d",cg);
			break;
		case 10: 		/* frequency and period */
			sprintf(tbuf,"frequencies of graph %d",cg);
			break;
		case 11:
			sprintf(tbuf,"periods of graph %d",cg);
			break;
		case 12:		/* first zero crossing */
			sprintf(tbuf,"zero crossings of graph %d",cg);
			break;
		case 13:		/* rise time */
			sprintf(tbuf,"rise times of graph %d",cg);
			break;
		case 14: 		/* fall time */
			sprintf(tbuf,"fall times of graph %d",cg);
			break;
		case 15: 		/* slopes     */
			sprintf(tbuf,"slopes of graph %d",cg);
			break;
		case 16: 		/* Y intercepts */
			sprintf(tbuf,"Y intercepts of graph %d",cg);
			break;
		case 17: 		/* set lengths */
			sprintf(tbuf,"set lengths of graph %d",cg);
			break;
		case 18: 		/* 1/2 maximal widths */
			sprintf(tbuf,"half maximal widths of graph %d",cg);
			break;
		case 19: 		/* barycenter X */
			sprintf(tbuf,"X barycenters of graph %d",cg);
			break;
		case 20: 		/* barycenter Y */
			sprintf(tbuf,"Y barycenters of graph %d",cg);
			break;
		case 21:		/* X of maximum Y */
			sprintf(tbuf,"X positions of maximum Y's of graph %d",cg);
			break;
		case 22:		/* Y of maximum X */
			sprintf(tbuf,"Y positions of maximum X's of graph %d",cg);
			break;
	}
	setcomment( gto, ns, tbuf );
	free( abscissa );
	plotone( gto );
}