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New posts in data-manipulation

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Creating longitudinal datasets with reshape

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R: Sum variables based on some condition

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R: Is there a "Un-Character" Command in R?

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remove rows with >50% missing across certain columns in R

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filter igraph object by vertex attribute value

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Select rows with at least one (any) negative value

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Append first row by group to original data

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How to do a conditional join in R with dplyr?

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R: Randomly Replace Values with NA

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Separate positive values into multiple rows on multiple columns

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Finding the number of consecutive days in data [duplicate]

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Add observation number by group in R [duplicate]

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Subtract successive rows in a dataframe grouped by id in pandas(Python)

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backfill pandas dataframe column using a condition

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Recoding an entire data frame using label-value pairs stored in a different dataframe

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