Some times get Imaginary component

Question

Some times get Imaginary component

AmberCheng opened this issue 4 years ago · comments

Hi， thanks for your wonderful work. I have met a value error recently. However, sometimes it happens, but if I rerun the code, it disappears. I wonder how can I solve it? But I am not sure why it happens.

Martin Heusel · Answer 1 · Tue Jan 05 2021 15:36:22 GMT+0800 (China Standard Time)

If it's related to calculate the FID this can happen if you use less than 2048 samples, better use 5000 or more.

DaisyXXXX · Answer 2 · Tue Jan 05 2021 15:39:19 GMT+0800 (China Standard Time)

If it's related to calculate the FID this can happen if you use less than 2048 samples, better use 5000 or more.

@mhex emm, I have set the number more than 2048, I will try a number more than 5000

DaisyXXXX · Answer 3 · Tue Jan 05 2021 16:50:29 GMT+0800 (China Standard Time)

If it's related to calculate the FID this can happen if you use less than 2048 samples, better use 5000 or more.

@mhex I have tried more than 5000 images to get the fid. I got the error that "ValueError: Imaginary component 815360134.861496", also I have printed the max and min of the covmean, they are (819473682044121.4-175735031.80444336j)(-519572693219721.6-221167776.40625j).