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dplyr is an R package whose set of functions are designed to enable dataframe (a spreadsheet-like data structure) manipulation in an intuitive, user-friendly way. It is one of the core packages of the popular tidyverse set of packages in the R programming language . [ 1 ]
Header cell, which can be column or row headers. Data cells are created with | Data cell. A new column can be added by adding another cell to the first row. To fill in the data for that column, add another data cell to the remaining rows. Spaces are ignored, thus | Data and |Data are identical.
The sort-merge join (also known as merge join) is a join algorithm and is used in the implementation of a relational database management system. The basic problem of a join algorithm is to find, for each distinct value of the join attribute, the set of tuples in each relation which display that value. The key idea of the sort-merge algorithm is ...
Candy canes are a peppermint treat long associated with Christmas. Learn their history, including why they were first made with red and white stripes.
The Mississippi Department of Corrections has announced the capture of a convicted killer who escaped on Christmas Eve.
New Orleans Pelicans star Zion Williamson has suffered yet another major setback. The Pelicans announced Saturday the 24-year-old forward has been diagnosed with a left hamstring strain and will ...
A polyphase merge sort is a variation of a bottom-up merge sort that sorts a list using an initial uneven distribution of sub-lists (runs), primarily used for external sorting, and is more efficient than an ordinary merge sort when there are fewer than eight external working files (such as a tape drive or a file on a hard drive).
A woman was set on fire and died, and two men were stabbed, one fatally, in two separate incidents aboard New York City subways on Sunday. Overall, though, crime on the transit system is down from ...