28.9 KnitR Basic Example
20200602 Our first example of running actual R code will generate some random uniform data using stats::runif() and then viewing the utils::head() of the data and calculating the base::mean(). The following code block shows how this will look in the source .Rnw file.
<<example_random_mean>>=
# Always include a short comment to support the code.
x <- runif(1000) * 1000
head(x)
mean(x)
@Below is what it looks like after it is processed by
knitr (Xie 2025) and then LaTeX (as happens when we click
the Compile PDF button in RStudio).
## [1] 900.8956 166.9349 929.4102 917.1092 539.6762 165.9014## [1] 512.7483Notice that the syntax is colour highlighted and the output is
included as comments introduced in R with the ##. If we were
to evaluate these commands ourselves in R the the output would not
include the ##.
References
———. 2025. Knitr: A General-Purpose Package for Dynamic Report Generation in r. https://yihui.org/knitr/.
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