Time-frequency data must be complex for source localization?

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Hello,
I would like to source localize the TFRs using the method apply_inverse_tfr_epochs since I have already computed them at the sensor level using tfr_multitaper and saved them as epochsTFR. However, when trying to reload them and apply inverse, I’m getting an error, as

RuntimeError: Time-frequency data must be complex for source space estimation

  • MNE version: 1.4.2
  • operating system: Linux mint 19.3

How to make my epochsTFR as a complex data? Any helpful suggestions to overcome this hurdle?

Thanks in advance,
Harish

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Upon a quick glance, tfr_multitaper does not seem to support outputting a complex TFR result, only power (which is a real number). If it is an option for you, try tfr_morlet and set output="complex"

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Hi @wmvanvliet ,
Yes, indeed tfr_morlet with output = "complex" works great for source localizing the epochsTRF using the method apply_inverse_tfr_epochs.

Thanks and best,
Harish

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