Allow exporting edf where a channel contains only constant values #12911
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Currently, exporting to edf fails if one channel contains only constant values and
physical_range="auto"
, becauseedfio
requires that (explicitly passed) physical minimum and maximum differ from each other (link). This requirement is suggested in Q8 in the EDF FAQ, because min == max leads to a division by zero when calculating the signal offset, which might cause an error when loading the file. This PR ensures that physical minimum and maximum are always different when usingphysical_range="auto"
. Forphysical_range="channelwise"
,edfio
takes care of that , asmne
passes no physical range toedfio.EdfSignal
.