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The Fred Fish Collection 1.5
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ffcollection-1-5-1992-11.iso
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ff_progs
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prog_c
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rexxplpt.lzh
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REXXPLPLOT
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EXAMPLES
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EXAMPLE01.PLOT
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1991-08-16
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/* Example01.Plot - Demonstration program for PLPLOT: */
/* Modified for RexxPlPlot by Glenn M. Lewis - 9/12/89 */
address 'PlPlot'
say 'Please be patient...'
/* Plots three simple functions, each function occupies a separate page */
do i=1 to 6
xs.i = i
ys.i = i * i
end i
space0 = 0
mark0 = 0
space1 = 1500
mark1 = 1500
/* Ask user to specify the output device */
'plstar(1,1);'
/* Set up the viewport and window using PLENV. The range in X is */
/* 0.0 to 6.0, and the range in Y is 0.0 to 30.0. The axes are */
/* scaled separately (just = 0), and we just draw a labelled */
/* box (axis = 0). */
'plenv(0.0,6.0,0.0,30.0,0,0);'
'pllab("(x)","(y)","\frPLPLOT Example 1 - y=x\u2");'
/* Plot the data points */
'plpoin(6,xs,ys,9);'
do i=1 to 60
x.i = 0.1*i;
y.i = pow(x.i,2.0);
end i
/* Draw the line through the data */
'plline(60,x,y);'
/*======================================================================*/
/* Set up the viewport and window using PLENV. The range in X is */
/* -2.0 to 10.0, and the range in Y is -0.4 to 2.0. The axes are */
/* scaled separately (just = 0), and we draw a box with axes */
/* (axis = 1). */
'plenv(-2.0,10.0,-0.4,1.2,0,1);'
'pllab("(x)","sin(x)/x","\frPLPLOT Example 1 - Sinc Function");'
/* Fill up the arrays */
do i=1 to 100
x.i = (i-20.0)/6.0
y.i = 1.0
if (x.i ~= 0.0) then y.i = sin(x.i)/x.i
end i
/* Draw the line */
'plline(100,x,y);'
/*======================================================================*/
/* For the final graph we wish to override the default tick intervals, */
/* and so do not use PLENV */
'pladv(0);'
/* Use standard viewport, and define X range from 0 to 360 degrees, */
/* Y range from -1.2 to 1.2. */
'plvsta();'
'plwind(0.0,360.0,-1.2,1.2);'
/* Draw a box with ticks spaced 30 degrees apart in X, and 0.2 in Y. */
'plbox("bcnst",30.0,3,"bcnstv",0.2,2);'
/* Superimpose a dashed line grid, with 1.5 mm marks and spaces. */
/* plstyl expects a pointer!! */
'plstyl(1, mark1, space1);'
'plbox("g",30.0,3,"g",0.2,2);'
'plstyl(0, mark0, space0);'
'pllab("Angle (degrees)","sine","\frPLPLOT Example 1 - Sine function");'
do i=1 to 101
x.i = 3.6 * (i - 1);
y.i = sin(x.i*3.141592654/180.0);
end i
'plline(101,x,y);'
/* Don't forget to call PLEND to finish off! */
'plend();'
exit 0