How to sort a dataframe by multiple column(s)

How to sort a dataframe by multiple column(s)

r sorting dataframe r-faq

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How to join (merge) data frames (inner, outer, left, right)

r join merge dataframe r-faq

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Drop data frame columns by name

r dataframe r-faq

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How do I replace NA values with zeros in an R dataframe?

r dataframe na missing-data imputation

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Remove rows with all or some NAs (missing values) in data.frame

r dataframe filter missing-data r-faq

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Convert a list to a data frame

r list dataframe

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The difference between bracket [ ] and double bracket [[ ]] for accessing the elements of a list or dataframe

r list dataframe extract r-faq

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Drop unused factor levels in a subsetted data frame

r dataframe r-factor r-faq

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Quickly reading very large tables as dataframes

r import dataframe r-faq

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Create an empty data.frame

r dataframe r-faq

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Changing column names of a data frame

r dataframe rename

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Extracting specific columns from a data frame

r dataframe r-faq

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How to sum a variable by group

r dataframe aggregate r-faq

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Combine a list of data frames into one data frame by row

r list dataframe r-faq

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Sample random rows in dataframe

r dataframe random r-faq

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