This is incorrect, because I know that the first scan of field 2 (the squiggly lines) was actually midway through the observation and not at the start. So it just looks to me like all the scans of field 2 were shifted left, to make its starting time 0.
I think you're simply computing time-min(time) on a per-field basis, when in fact min(time) should be just one number for the entire table.
I'm seeing something like this:
This is incorrect, because I know that the first scan of field 2 (the squiggly lines) was actually midway through the observation and not at the start. So it just looks to me like all the scans of field 2 were shifted left, to make its starting time 0.
I think you're simply computing
time-min(time)
on a per-field basis, when in fact min(time) should be just one number for the entire table.