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New posts in data-manipulation

Create column based on matched characters from another column and set all remaining unmatched characters to specified value

jQuery jqGrid Show message when an edit row is complete

pandas dataframe generate rows

Merge two CSV and collate data

How to change column values in dataframe in pandas?

Protecting assembly from hacker

Creating longitudinal datasets with reshape

r reshape data-manipulation

R: Sum variables based on some condition

Group and count JSON using jq [duplicate]

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

r data-manipulation

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

r data-manipulation

filter igraph object by vertex attribute value

Select rows with at least one (any) negative value

Append first row by group to original data

r append data-manipulation

How to do a conditional join in R with dplyr?

r join dplyr data-manipulation

R: Randomly Replace Values with NA

r data-manipulation

Separate positive values into multiple rows on multiple columns

Finding the number of consecutive days in data [duplicate]

r dplyr data-manipulation

Add observation number by group in R [duplicate]

r data-manipulation

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