Petite fiche sur comment lire les données massives dans R:
https://rstudio-pubs-static.s3.amazonaws.com/72295_692737b667614d369bd87cb0f51c9a4b.html
Use R data.table i/o data.frame for large datasets:
https://www.analyticsvidhya.com/blog/2016/05/data-table-data-frame-work-large-data-sets/
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