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How to import interpolation functions for complex numbers？

Posted Jul 8, 2022, 9:47 a.m. EDT 5 Replies

Yu Xiao Wu
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When using the interpolation function and importing data through EXCEL, it is found that COMSOL cannot import data when there is a complex form of data, such as 1+i. So how do I import complex numbers from a file when using the interpolation function?

5 Replies Last Post Jul 29, 2022, 8:01 p.m. EDT
Jeff Hiller COMSOL Employee

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Posted: 2 years ago Jul 8, 2022, 9:59 a.m. EDT
Updated: 2 years ago Jul 8, 2022, 10:00 a.m. EDT

One column for the real part, one column for the imaginary part.

Jeff

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Jeff Hiller
One column for the real part, one column for the imaginary part. Jeff
Yu Xiao Wu
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Posted: 2 years ago Jul 8, 2022, 10:22 a.m. EDT

OK. Thanks for the suggestion. lol But this is really inconvenient, especially when the amount of data is large

OK. Thanks for the suggestion. lol But this is really inconvenient, especially when the amount of data is large
Yu Xiao Wu
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Posted: 2 years ago Jul 8, 2022, 10:35 a.m. EDT

One column for the real part, one column for the imaginary part.

Jeff

I would like to ask. If I want to load discrete pressure field data, in the form of f(x,y,value), is there any better way besides using interpolation function?

Hope to receive your reply

>One column for the real part, one column for the imaginary part. > >Jeff I would like to ask. If I want to load discrete pressure field data, in the form of f(x,y,value), is there any better way besides using interpolation function? Hope to receive your reply
Jeff Hiller COMSOL Employee

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Posted: 2 years ago Jul 8, 2022, 10:52 a.m. EDT

That's the right approach.

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Jeff Hiller
That's the right approach.
Massimo Martinelli
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Posted: 2 years ago Jul 29, 2022, 8:01 p.m. EDT

I am trying to import data using Definitions -> Functions -> Interpolation. Data is in Grid format and values are complex. The error I get is "Format of data file is not correct". The file in question has been generated in Comsol, so I assume that the issue is due to the complex values. I am not sure how to apply Jeff's suggestion in the case of a grid file. I tried in the case of 1 dimensional data by changing each line from A+Bi to A B but I still get the same error. Any help would be appreciated

I am trying to import data using Definitions -> Functions -> Interpolation. Data is in Grid format and values are complex. The error I get is "Format of data file is not correct". The file in question has been generated in Comsol, so I assume that the issue is due to the complex values. I am not sure how to apply Jeff's suggestion in the case of a grid file. I tried in the case of 1 dimensional data by changing each line from A+Bi to A B but I still get the same error. Any help would be appreciated

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