Error using rf.internal.checkfreq Expected Frequencies to be nonnegative.

Question

Bárbara Matos 2022-4-18

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https://ww2.mathworks.cn/matlabcentral/answers/1699225-error-using-rf-internal-checkfreq-expected-frequencies-to-be-nonnegative

编辑： Anjaneyulu Bairi 2024-1-10

1.png

Hello! I am trying to run the code presented in image 1 and it appears an error. I realize it's because I can't have negative frequencies. But I don't understand why. I want to center the frequencies of the signal at zero and for that I'm looking for a way to be able to use negative frequencies. Any suggestion? Thanks

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Da Huang 2023-6-10

the default sparameter object does not support negative frequency value. You will have to create your own object/structure to host your data.

all snp files are expecting to have nonnegative frequency values.

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Answer 1

Anjaneyulu Bairi 2024-1-10

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https://ww2.mathworks.cn/matlabcentral/answers/1699225-error-using-rf-internal-checkfreq-expected-frequencies-to-be-nonnegative#answer_1386916

编辑：Anjaneyulu Bairi 2024-1-10

Hi,

I understand that you are trying to use negative values of frequencies in “sparameters” function from RF toolbox. This is happening because “sfrequency” value provided along with the “sparameters” function should only be positive real numbers.