PTE results showing -Inf

Hi all,
I computed the PTE, then I got some results showing -Inf. What does it mean?
When I further analyze the PTE results in Matlab, some results indicating "-Inf" will cause an error.
What should I do? Could you give me some advice?

Thank you in advance.

Best,
Jun

@MartinC @Sylvain?

Hi Jun,

Do you get these infinite values when you check "Return normalized phase transfer entropy", or when it is unchecked? A division by zero when computing the norm for normalization could be what is causing this.

You could try adding a breakpoint in function PhaseTE_MF.m and see where your infinite values are introduced, or you can share your problematic file with us so we debug it ourselves.

Let us know,
Martin

Hi Martin
When I check "Return normalized phase transfer entropy", I get these infinite values.
Does this infinite value mean almost zero " 0 " ?

Jun

Hi Junichi,

I would personally interpret these values as 0. It's probably best you do not use normalization when you get invalid results for proper interpretation of your results.

For your information, we did not code the PTE computation in Brainstorm, we’re using the following published implementation: https://figshare.com/articles/Phase_Transfer_Entropy/3847086 You can contact the authors for help in interpreting your results.

Cheers,
Martin