Tag data-table - Questa è pagina 11 - GeneraCodice

Aggregating duplicate rows by taking sum

https://www.generacodice.com/it/articolo/13092277/aggregating-duplicate-rows-by-taking-sum

r - plyr - data.table

Recombining artificially split sessions in sales data based on multiple conditions

https://www.generacodice.com/it/articolo/13073047/recombining-artificially-split-sessions-in-sales-data-based-on-multiple-conditions

r - data.table

Using roll=TRUE with allow.cartesian=TRUE

https://www.generacodice.com/it/articolo/13067860/using-roll-true-with-allow-cartesian-true

join - r - cartesian-product - data.table

Number of Unique Rows in Subgroup

https://www.generacodice.com/it/articolo/13059538/number-of-unique-rows-in-subgroup

r - data.table

Find rows with duplicate values across a small set of columns in R

https://www.generacodice.com/it/articolo/13052806/find-rows-with-duplicate-values-across-a-small-set-of-columns-in-r

r - data.table

R: Checking if a set of variables forms a unique index

https://www.generacodice.com/it/articolo/13044508/r-checking-if-a-set-of-variables-forms-a-unique-index

r - data.table

Fastest way to extract hour from time (HH:MM)

https://www.generacodice.com/it/articolo/13020436/fastest-way-to-extract-hour-from-time-hh-mm

time - r - hour - data.table

Calculation on subset of data without first saving subset as new data.frame

https://www.generacodice.com/it/articolo/13018051/calculation-on-subset-of-data-without-first-saving-subset-as-new-data-frame

r - dataframe - subset - plyr - data.table

Is a copy made when function returns a data.table?

https://www.generacodice.com/it/articolo/13011919/is-a-copy-made-when-function-returns-a-data-table

r - data.table

Conditionally remove duplicate elements from a data.table

https://www.generacodice.com/it/articolo/13005559/conditionally-remove-duplicate-elements-from-a-data-table

merge - duplicates - r - conditional-statements - data.table

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