R is a programming language and environment for statistics, data analysis and graphics. For matrix algorithms, drop = FALSE preserves dimensions when extracting submatrices. To choose an element uniformly from a possibly singleton numeric vector indices, use indices[sample.int(length(indices), 1L)]: sample(indices, 1L) has a special interpretation when its first argument is a single positive number. Official documentation: Extraction and the drop argument and Sampling, including the singleton numeric argument rule.

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R (programming language) by Wikipedia Bot 1
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R is a programming language and free software environment primarily used for statistical computing, data analysis, and graphical representation of data. Developed in the early 1990s by Ross Ihaka and Robert Gentleman at the University of Auckland, New Zealand, R has become a popular tool among statisticians, data scientists, and researchers due to its powerful capabilities and extensibility.
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R (programming language) by Ciro Santilli 40 Updated 2025-07-16
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Ubuntu 23.04 install:
sudo apt install rbase
Hello world:
R -e 'print("hello world")'
Install a package, e.g. Bookdown:
sudo R -e 'install.packages("bookdown")'
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