<html> <head> <title>example4.gri</title> </head> <body bgcolor="#FFFFFF"> <pre> <font color=#B22222># Example 4 -- Simple contour graph</font> <font color=#B22222>#</font> <font color=#B22222># Read x-grid; blank-line means stop reading.</font> read grid x 0 .2 1 <font color=#B22222># Note that the x-grid was irregular. The y-grid</font> <font color=#B22222># in this example is regular, so we can just set</font> <font color=#B22222># it to range from 10 to 20, incrementing by 2.5.</font> set y grid 10 20 2.5 <font color=#B22222># Thus we now have a grid 3 wide and 5 high. Let's</font> <font color=#B22222># read the actual data now.</font> read grid data 1 2 3 2 3 4 3 4 5 4 5 6 5 6 7 <font color=#B22222># Now draw contours (automatically set; we could</font> <font color=#B22222># have done `draw contour 2' to draw contour fro</font> <font color=#B22222># value 2 or `draw contour 1 10 2' to draw contours</font> <font color=#B22222># ranging from 1 to 10 with an increment of 2.)</font> draw contour draw title <font color=#2F4F4F>"Example 4"</font> </pre> </body> </html>
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