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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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INTEGER function

Posted 2010年11月22日 GMT-5 17:56 Low-Frequency Electromagnetics Version 4.2a 8 Replies

Jozef Brcka
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... does anybody know how to call INTEGER function in Comsol? I can't fint ...
8 Replies Last Post 2012年3月29日 GMT-4 08:05
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2010年11月23日 GMT-5 05:30
Hi

good remark there seem to be no ceil(), floor(), integer() or frac(),
funny, have you asked "support" ?

--
Good luck
Ivar
Hi good remark there seem to be no ceil(), floor(), integer() or frac(), funny, have you asked "support" ? -- Good luck Ivar
Magnus Ringh COMSOL Employee

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Posted: 1 decade ago 2010年11月23日 GMT-5 07:16
Hi,

abs, ceil, floor, and round exist among the built-in mathematical functions in COMSOL Multiphysics. I'm not sure what the definition of an integer function would be. COMSOL Multiphysics uses floating-point arithmetic.

Best regards,
Magnus Ringh, COMSOL
Hi, abs, ceil, floor, and round exist among the built-in mathematical functions in COMSOL Multiphysics. I'm not sure what the definition of an integer function would be. COMSOL Multiphysics uses floating-point arithmetic. Best regards, Magnus Ringh, COMSOL
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2010年11月23日 GMT-5 09:52
Hi Magnus

good to hear, I just couldnt find them in the V3.5a doc, didnt look at the right place ?,

I forgot to check in the V4 ) Now I see them there (p86, 87 CMPUserGuide.pdf v4.1)

--
Good luck
Ivar
Hi Magnus good to hear, I just couldnt find them in the V3.5a doc, didnt look at the right place ?, I forgot to check in the V4 ) Now I see them there (p86, 87 CMPUserGuide.pdf v4.1) -- Good luck Ivar
Jens Krause
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Posted: 1 decade ago 2012年2月9日 GMT-5 03:32

Hi Magnus

good to hear, I just couldnt find them in the V3.5a doc, didnt look at the right place ?,

I forgot to check in the V4 ) Now I see them there (p86, 87 CMPUserGuide.pdf v4.1)

--
Good luck
Ivar


Hi Magnus, Ivar and others,

I came across this posting because I ran into situation where V 42a requires
and integer not a floating point and that is "Sector Symmetry" from "Rotating Machinery, Magnetic"
in the AC/DC module.

I want to define a global parameter to define the number of sectors 'nsect' and use this
parameter to define geometry and in "Sector symmetry". This does not work because
CMP complains about 'nsect' being a floating point number. How can I cast this
to an integer.

thanks for any ideas

regards

Jens
[QUOTE] Hi Magnus good to hear, I just couldnt find them in the V3.5a doc, didnt look at the right place ?, I forgot to check in the V4 ) Now I see them there (p86, 87 CMPUserGuide.pdf v4.1) -- Good luck Ivar [/QUOTE] Hi Magnus, Ivar and others, I came across this posting because I ran into situation where V 42a requires and integer not a floating point and that is "Sector Symmetry" from "Rotating Machinery, Magnetic" in the AC/DC module. I want to define a global parameter to define the number of sectors 'nsect' and use this parameter to define geometry and in "Sector symmetry". This does not work because CMP complains about 'nsect' being a floating point number. How can I cast this to an integer. thanks for any ideas regards Jens
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2012年2月9日 GMT-5 03:42
Hi

have you checked the help/doc on operators such as ceil() and round() ?

But these make the solution spiky so depending on how you use the variable the solver might have issues getting derivatives

--
Good luck
Ivar
Hi have you checked the help/doc on operators such as ceil() and round() ? But these make the solution spiky so depending on how you use the variable the solver might have issues getting derivatives -- Good luck Ivar
Jens Krause
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Posted: 1 decade ago 2012年2月9日 GMT-5 03:45
Yes I did, but these functions return integer numbers in floating
point format and Comsol expect a real integer here.

Jens
Yes I did, but these functions return integer numbers in floating point format and Comsol expect a real integer here. Jens
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2012年2月9日 GMT-5 03:59
Hi

good point, I would say then ask "support"

And report back ;)

--
Good luck
Ivar
Hi good point, I would say then ask "support" And report back ;) -- Good luck Ivar
Jens Krause
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Posted: 1 decade ago 2012年3月29日 GMT-4 08:05
Hi,

Comsol suppor told me that in the next release the entry for
the number of symmetry sectors accepts global parameters.


Regards

Jens
Hi, Comsol suppor told me that in the next release the entry for the number of symmetry sectors accepts global parameters. Regards Jens

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