Home » Images » Image_Graph » Bug #9068

[2006-10-17 19:39 UTC] david_wees at yahoo dot com

Description:
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When you use $AxisY->forceMinimum($ymin); you see the minimum value of y, the graph doesn't display any values of the user defined function less than the value request.

However, if you use $AxisY->forceMaximum($ymax); the graph displayed apparently uses $ymax for the display, instead of just ignoring values greater than the $ymax given.

Test script:
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You can view the script at:

http://www.unitorganizer.com/download/vector.zip

Call the script with a function using:

vector.php?f=x^2&ymin=-10&ymax=10&xmin=-10&xmax=10

and try:

vector.php?f=-x^2&ymin=-10&ymax=10&xmin=-10&xmax=10

Expected result:
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You should see with the first example that the graph displays a vertical line at 10 for values of the function that are greater than 10, but with the 2nd example, the graph displays nothing for values of the graph less than -10.

[2006-10-18 05:29 UTC] david_wees at yahoo dot com

Note that I meant horizontal line rather than vertical line.