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Piecewise Function is giving Unknown variable error.

Posted Feb 5, 2020, 11:11 p.m. EST Electromagnetics, Low-Frequency Electromagnetics, Equation-Based Modeling Version 5.4 2 Replies

Ayush Kumar
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I am using comsol 5.4. When I define a piecewise function and use it to write expression it is giving an "unknown variable error". (see images). What is going wrong here??(units are all correct)

2 Replies Last Post Feb 6, 2020, 4:12 a.m. EST
Frank van Gool
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Posted: 5 years ago Feb 6, 2020, 4:03 a.m. EST

Hi Ayush, you defined a function, thus should call it with its argument: Eac(n)

Hi Ayush, you defined a function, thus should call it with its argument: Eac(n)
Edgar J. Kaiser Certified Consultant
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Posted: 5 years ago Feb 6, 2020, 4:12 a.m. EST

The argument in the function call doesn't need to be 'n', which is just a generic variable in the function definition. It can be any valid expression. But there must be an argument.

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Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
The argument in the function call doesn't need to be 'n', which is just a generic variable in the function definition. It can be any valid expression. But there must be an argument.

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