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logical inputs must be scalar
Posted 29 sept. 2010, 08:19 UTC−4 1 Reply
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Hello,
I am very new to Comsol Multiphysics, using Femlab version 2.3
Whenever I try to create a geometry for an object (e.g. Diference between to co-centered circles with the same radius) I get the following error message:
logical inputs must be scalar
What is the reson for this?
Any help is welcome!
Thanks
I am very new to Comsol Multiphysics, using Femlab version 2.3
Whenever I try to create a geometry for an object (e.g. Diference between to co-centered circles with the same radius) I get the following error message:
logical inputs must be scalar
What is the reson for this?
Any help is welcome!
Thanks
1 Reply Last Post 29 sept. 2010, 09:19 UTC−4
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Posted:
1 decade ago
Hi
I have never use that old FEMLAb ;) but from the message I suspect you are giving in a variable defined as an array ([1,2,3, ...] in matlab) and your function only accepts a scalar value (=single number).
This remains an issue in Comsol 4, as only a few entries accept arrays or sets, mostly they only accept a single value (but that can be an arithmetic expression !). Unfortunately COMSOL developpers have still not identified these array fields with i.e a [ ] or { } brackets around the field entry in the GUI to tell us "I accept several values and not only scalars".
Hopefully, when the development is >80% of v3.5 on V4, we will see some cleanup in the GUI such as theone above , as well as bold text for fields (as the displacement field "_u_" to distinguish it from it's first component "u")
--
Good luck
Ivar
I have never use that old FEMLAb ;) but from the message I suspect you are giving in a variable defined as an array ([1,2,3, ...] in matlab) and your function only accepts a scalar value (=single number).
This remains an issue in Comsol 4, as only a few entries accept arrays or sets, mostly they only accept a single value (but that can be an arithmetic expression !). Unfortunately COMSOL developpers have still not identified these array fields with i.e a [ ] or { } brackets around the field entry in the GUI to tell us "I accept several values and not only scalars".
Hopefully, when the development is >80% of v3.5 on V4, we will see some cleanup in the GUI such as theone above , as well as bold text for fields (as the displacement field "_u_" to distinguish it from it's first component "u")
--
Good luck
Ivar