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bugs in formula evaluation and plotting
Posted Jul 18, 2016, 9:04 p.m. EDT Version 5.2 1 Reply
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I want to report a couple of weird bugs in formula evaluation and function range:
a) In the attachment GlobalDefinitions / Analytic 1 has a specified range of 0<x<1, but the plot shows from 0 to 0.305.
b) In Geometry 1 / Parametric Curve 1, the formula cos(5.0002*pi*s) evaluates to 1 for s<2 for some strange reason. sin(5.0002*pi*s) works normal.
--Chris
a) In the attachment GlobalDefinitions / Analytic 1 has a specified range of 0<x<1, but the plot shows from 0 to 0.305.
b) In Geometry 1 / Parametric Curve 1, the formula cos(5.0002*pi*s) evaluates to 1 for s<2 for some strange reason. sin(5.0002*pi*s) works normal.
--Chris
Attachments:
1 Reply Last Post Jul 19, 2016, 2:38 a.m. EDT
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Posted:
8 years ago
Hi,
a) If you use any other variable than x, y, or, z (the coordinates) in your function it works as expected. The weird behavior that you see, seems to be a side effect of using non-SI geometry units. So plotting to '1' implicitly plots to 1[ft], which is 0.3048[m]. It seems that the unit of 'x' is transformed when it should not.
I have reported this behavior as a bug.
I would, by the way, recommend that you always fill in the 'Units' section when defining a function.
b) This problem is not present in 5.2a. In 5.2, you can solve it by setting 'Relative tolerance' to 1E-3 in the 'Advanced Settings' section.
Regards,
Henrik
a) If you use any other variable than x, y, or, z (the coordinates) in your function it works as expected. The weird behavior that you see, seems to be a side effect of using non-SI geometry units. So plotting to '1' implicitly plots to 1[ft], which is 0.3048[m]. It seems that the unit of 'x' is transformed when it should not.
I have reported this behavior as a bug.
I would, by the way, recommend that you always fill in the 'Units' section when defining a function.
b) This problem is not present in 5.2a. In 5.2, you can solve it by setting 'Relative tolerance' to 1E-3 in the 'Advanced Settings' section.
Regards,
Henrik