![trying to summarize each unique ID into one row after merging two data frames with data.table - but two columns become N/A for all values after summarizing?? : r/rstats trying to summarize each unique ID into one row after merging two data frames with data.table - but two columns become N/A for all values after summarizing?? : r/rstats](https://preview.redd.it/trying-to-summarize-each-unique-id-into-one-row-after-v0-zc68mhdfkdka1.png?width=674&format=png&auto=webp&s=19796fb9cfcb401543450aaeea5fa68a4ea4861a)
trying to summarize each unique ID into one row after merging two data frames with data.table - but two columns become N/A for all values after summarizing?? : r/rstats
DataCamp on X: "data.table R package cheat sheet, check it out! - https://t.co/lUXkLMPhxo https://t.co/3U2eO0bTUh" / X
![trying to summarize each unique ID into one row after merging two data frames with data.table - but two columns become N/A for all values after summarizing?? : r/rstats trying to summarize each unique ID into one row after merging two data frames with data.table - but two columns become N/A for all values after summarizing?? : r/rstats](https://preview.redd.it/trying-to-summarize-each-unique-id-into-one-row-after-v0-2s7vlb5ckdka1.png?width=436&format=png&auto=webp&s=3ade296f28f3b24868e06a5b1b1b9c80477a0e9f)