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New posts in data.table

Data.table: Join on ID and Date key, but want closest date before (or equal to ) date key in first table

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duplicate rows in my counting by group with data.table in R

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How to create data.table with additional rows from table based on a condition

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creating new variable that takes into account prior information from the earlier records

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How do I read indented data?

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Cbind two data but with some modifications using data.table

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R: Days since last event per ID

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Issue class coercion filtered R data.table ifelse, if_else, if ... else

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lapply with two column arguments

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Plotting a stacked bar chart with data table

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How to dynamically use lapply in data.table?

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Update join: replace with values from a column with the same name

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Summarize a data.table across multiple columns

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Row operations on selected columns based on substring in data.table

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How to create a co-occurrence matrix calculated from combinations by ID/row in R?

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Factor levels by group

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Find nearest value by group

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Remove all data matching ID if first row meets specific condition

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