ric325
commented
3 years ago Hi Phil
You are correct – I don’t see that you should have the same species for the same Lat, Lon, Date, Time. Maybe something has been cutoff and not combined. For example, the same species will have males, females and juveniles, and unless you have that information for life stage (i.e. they haven’t been lumped to species) then you would have 3 separate abundances for the same species at the same time and place. Worth checking.
Cheers Ant
From: Phil Dyer @.> Reply to: MathMarEcol/pdyer_aus_bio @.> Date: Wednesday, 4 August 2021 at 3:28 pm To: MathMarEcol/pdyer_aus_bio @.> Cc: Subscribed @.> Subject: [MathMarEcol/pdyer_aus_bio] Apparent duplication of rows in zoo and phy data (#6)
Following on from #5https://github.com/MathMarEcol/pdyer_aus_bio/issues/5, I am now keeping track of samples from datasets, I am not aggregating by time and then space at a later point, but aggregating once into grid cells from all samples in the cell.
For the zooplankton and pytoplankton datasets, samples should be uniquely defined by lon, lat and time. I also expect a species to be counted once in a sample, so for a given lon, lat, time and species, there should be exactly one abundance recorded. However, I am finding rows where more than one abundance is recorded for a species at a given lon, lat and time.
I am currently discussing this with Claire Davies, this github issue is to document the problem and track the resolution.
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PhDyellow
Following on from #5, I am now keeping track of samples from datasets, I am not aggregating by time and then space at a later point, but aggregating once into grid cells from all samples in the cell.
For the zooplankton and pytoplankton datasets, samples should be uniquely defined by lon, lat and time. I also expect a species to be counted once in a sample, so for a given lon, lat, time and species, there should be exactly one abundance recorded. However, I am finding rows where more than one abundance is recorded for a species at a given lon, lat and time.
I am currently discussing this with Claire Davies, this github issue is to document the problem and track the resolution.