Menu

Discussion Forum

New Discussion
Filtra

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Piecewise Function is giving Unknown variable error.

Posted 5 feb 2020, 23:11 GMT-5 Electromagnetics, Low-Frequency Electromagnetics, Equation-Based Modeling Version 5.4 2 Replies

Ayush Kumar
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

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 6 feb 2020, 04:12 GMT-5
Frank van Gool
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 5 years ago 6 feb 2020, 04:03 GMT-5

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
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 5 years ago 6 feb 2020, 04:12 GMT-5

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.

-------------------
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.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content