Computed activity fields

[pepe]

Found a better script from David:

Custom activity streams from fit file messages

You need to add a post processing step to fill in the missing values with the previous value: { for (let m of icu.fit) { if (m._num !== 104) continue let ts = m.f_253.value if (ts) data.setAt(ts, m.f_2.value) } let prev for (let i = 0; i < data.length; i++) { if (data[i]) prev = data[i] else data[i] = prev } }