/usr/share/ncarg/hluex/xyplot/xy07c.c is in libncarg-data 6.4.0-9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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** $Id: xy07c.c,v 1.8 2010-03-15 22:49:25 haley Exp $
*/
/************************************************************************
* *
* Copyright (C) 1995 *
* University Corporation for Atmospheric Research *
* All Rights Reserved *
* *
************************************************************************/
/*
** File: xy07c.c
**
** Author: Mary Haley (converted from example "agex11")
** National Center for Atmospheric Research
** PO 3000, Boulder, Colorado
**
** Date: Wed Jan 4 17:48:02 MST 1995
**
** Description: This example is similar to the ncargex Autograph
** example "agex11". It shows how to draw a "scattergram".
** It also shows one way on how to modify the color map
** so we can get a different background/foreground color.
*/
#include <stdio.h>
#include <math.h>
#include <ncarg/hlu/hlu.h>
#include <ncarg/hlu/ResList.h>
#include <ncarg/hlu/App.h>
#include <ncarg/hlu/NcgmWorkstation.h>
#include <ncarg/hlu/PSWorkstation.h>
#include <ncarg/hlu/PDFWorkstation.h>
#include <ncarg/hlu/CairoWorkstation.h>
#include <ncarg/hlu/XyPlot.h>
#include <ncarg/hlu/CoordArrays.h>
#define NPTS 250
#define pow5(x) ((x)*(x)*(x)*(x)*(x))
/*
* Create data arrays for XyPlot object.
*/
float xdra[NPTS], ydra[NPTS];
int main()
{
int appid,xworkid,plotid,dataid[2];
int rlist, i, j;
ng_size_t len[2];
float x;
float cmap[4][3];
char datastr[10];
extern float fran();
char const *wks_type = "x11";
/*
* Initialize the HLU library and set up resource template.
*/
NhlInitialize();
rlist = NhlRLCreate(NhlSETRL);
/*
* Change the color map so we can have a white background, a black
* foreground and two colors defined for our markers. Color '0' is
* the background color and '1' is the foreground color.
*/
cmap[0][0] = cmap[0][1] = cmap[0][2] = 1.;
cmap[1][0] = cmap[1][1] = cmap[1][2] = 0.;
cmap[2][1] = cmap[2][2] = 0.;
cmap[2][0] = 1.;
cmap[3][0] = cmap[3][1] = 0.;
cmap[3][2] = 1.;
len[0] = 4; len[1] = 3;
/*
* Create Application object. The Application object name is used to
* determine the name of the resource file, which is "xy07.res" in
* this case.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNappDefaultParent,"True");
NhlRLSetString(rlist,NhlNappUsrDir,"./");
NhlCreate(&appid,"xy07",NhlappClass,NhlDEFAULT_APP,rlist);
if (!strcmp(wks_type,"ncgm") || !strcmp(wks_type,"NCGM")) {
/*
* Create an NCGMWorkstation object.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkMetaName,"./xy07c.ncgm");
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,len);
NhlCreate(&xworkid,"xy07Work",NhlncgmWorkstationClass,
NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"x11") || !strcmp(wks_type,"X11")) {
/*
* Create an X11 workstation.
*/
NhlRLClear(rlist);
NhlRLSetInteger(rlist,NhlNwkPause,True);
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,len);
NhlCreate(&xworkid,"xy07Work",NhlcairoWindowWorkstationClass,
NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"oldps") || !strcmp(wks_type,"OLDPS")) {
/*
* Create an older-style PostScript workstation.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkPSFileName,"./xy07c.ps");
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,len);
NhlCreate(&xworkid,"xy07Work",NhlpsWorkstationClass,
NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"oldpdf") || !strcmp(wks_type,"OLDPDF")) {
/*
* Create an older-style PDF workstation.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkPDFFileName,"./xy07c.pdf");
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,len);
NhlCreate(&xworkid,"xy07Work",NhlpdfWorkstationClass,
NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"pdf") || !strcmp(wks_type,"PDF") ||
!strcmp(wks_type,"ps") || !strcmp(wks_type,"PS")) {
/*
* Create a cairo PS/PDF workstation.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkFileName,"./xy07c");
NhlRLSetString(rlist,NhlNwkFormat, (char*)wks_type);
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,len);
NhlCreate(&xworkid,"xy07Work",NhlcairoDocumentWorkstationClass,
NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"png") || !strcmp(wks_type,"PNG")) {
/*
* Create a cairo PNG workstation.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkFileName,"./xy07c");
NhlRLSetString(rlist,NhlNwkFormat, (char*)wks_type);
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,len);
NhlCreate(&xworkid,"xy07Work",NhlcairoImageWorkstationClass,
NhlDEFAULT_APP,rlist);
}
/*
* Since we have two sets of points that we want to color differently,
* we need to create two Data obects here.
*/
for( j = 0; j < 2; j++ ) {
/*
* Initialize data.
*/
for( i = 0; i < NPTS; i++ ) {
x = 2.*(fran()-.5);
xdra[i] = .5 + pow5(x);
x = 2.*(fran()-.5);
ydra[i] = .5 + pow5(x);
}
/*
* Define a data object. Note that we are naming each object differently
* so we can distinguish them in the resource file.
*/
NhlRLClear(rlist);
NhlRLSetFloatArray(rlist,NhlNcaXArray,xdra,NhlNumber(xdra));
NhlRLSetFloatArray(rlist,NhlNcaYArray,ydra,NhlNumber(ydra));
sprintf( datastr, "xyData%1d", j );
NhlCreate(&dataid[j],datastr,NhlcoordArraysClass,
NhlDEFAULT_APP,rlist);
}
/*
* Create the XyPlot object.
*/
NhlRLClear(rlist);
NhlRLSetIntegerArray(rlist,NhlNxyCoordData,dataid,NhlNumber(dataid));
NhlCreate(&plotid,"xyPlot",NhlxyPlotClass,xworkid,rlist);
NhlRLDestroy(rlist);
/*
* Draw the plot.
*/
NhlDraw(plotid);
/*
* This flushes the buffer and then clears the Workstation.
*/
NhlFrame(xworkid);
/*
* NhlDestroy destroys the given id and all of its children
* so destroying xworkwid will also destroy plotid.
*/
NhlDestroy(xworkid);
/*
* Restores state.
*/
NhlDestroy(appid);
NhlClose();
exit(0);
}
float fran()
{
/*
* Pseudo-random-number generator.
*/
static double x = 2.718281828459045;
extern double fmod();
x = fmod(9821.*x+.211327,1.);
return((float)x);
}
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