halo_id in CosmoDC2 - Githubissues

LSSTDESC / DC2-production

Configuration, production, validation specifications and tools for the DC2 Data Set.

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halo_id in CosmoDC2 #305

Closed plaszczy closed 5 years ago

plaszczy commented 5 years ago

anomaly (?) observed on cosmodc2

plaszczy commented 5 years ago

when looking at holao_id's on somoDC2_v1.0 I was struck by 2 things

there are some negative values
there is about as many unique id's as objects3862614101 . here is the (unique) halo stat:


|summary|             count|
+-------+------------------+
|  count|        3720824405|
|   mean|1.0381070646089787|
| stddev|0.6033381752599895|
|    min|                 1|
|    max|              1339|
+-------+------------------+```

Is this normal/known/corrected (I can hardly verify it on 1.1.4)?

yymao commented 5 years ago

Thanks, @plaszczy. Moving this issue to https://github.com/LSSTDESC/cosmodc2/issues/81 and https://github.com/LSSTDESC/cosmodc2/issues/82.