Function expression that includes an exponent that is not an integer number

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María Claudia

• September 22, 2020 15:52

Hi!

I need help please.

I'm trying to write a function tat includes an exponent that is not an integer number but I receive an error while doing this.

Is there any alternative way to solve this problem?

This is an empirical formula that I can't change.

 

Here the screen of the error:

Thanks.

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• Official comment

  

  Rick Kossik

  • September 22, 2020 16:05

  You cannot logically take a value that has dimensions (e.g., m or kg) and raise it to a non-integer power.  This would result in dimensions of kg^1.5 which is meaningless.  I'm guessing that this is an empirical expression.  To get around this, you need to do what is called "unit casting".  This is discussed here: https://help.goldsim.com/#!Modules/5/unitcasting.htm.  Cast the value to be dimensionless, carry out the operation of raising it to a power, and then assign whatever units you wish to use.

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  María Claudia

  • September 22, 2020 16:14

  Rick:

  I understood. Thank you.

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  María Claudia

  • September 22, 2020 16:16

  I can't see the post in the link you send me, it says "topic not found".

  Do you have another link?

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  Rick Kossik

  • September 22, 2020 16:21

  https://help.goldsim.com/#!Modules/5/unitcasting.htm

   

   

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