Some times get Imaginary component

[AmberCheng]

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.

[mhex]

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

[AmberCheng]

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

[AmberCheng]

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).