The R package knitr is a general-purpose literate programming engine, with lightweight API's designed to give users full control of the output without heavy coding work. It combines many features into one package with slight tweaks motivated from my everyday use of Sweave. See the package homepage for details and examples. See FAQ's for a list of frequently asked questions (including where to ask questions).
Installation
Knit Package R Download For Machine Learning
You can install the stable version on CRAN:
You can also install the development version from RForge, which provides daily build of knitr:
Chapter 3 An analysis of R package download trends. This chapter explores R package download trends using the cranlogs package, and it shows how drake’s custom triggers can help with workflows with remote data sources. RStudio not knitting PDF or Word on Mac I installed the latest version of MacTex, then RStudio.98.1062 Clicking Knit PDF or Knit Word just produces an HTML file.
If you know GIT and
R CMD build
, here is another way:Motivation
Whether to use pandoc, a package built into R. But really easy on Windows/Mac with only a few megabytes of download. How to convert R Markdown to HTML? I.e., What does “Knit HTML” do in Rstudio 0.96? Pandoc version 1.12.3 or higher is required and was not found (R shiny) 7. RStudio is an integrated development environment (IDE) for R. It includes a console, syntax-highlighting editor that supports direct code execution, as well as tools for plotting, history, debugging and workspace management. RStudio Release Notes [email protected]. Setting non-default Knit Directory no longer breaks R. X11 device and rgl package not working properly on on Mac.
While Sweave and related add-on packages like cacheSweave and pgfSweave are fairly good engines for literate programming in R, but I often feel my hands are tied, for example:
- I stared at the source code of Sweave and wished for hundreds of times that if only I could easily insert
[width=.8textwidth]
betweenincludegraphics
and{my-plot.pdf}
(the official way in Sweave issetkeys{Gin}
but it is setting a global width, which is unrealistic since we often have to set widths individually; yes, you can usesetkeys{Gin}
for many times, but why not just provide an option for each chunk?) - I wished for many times that if only I could use graphics devices other than PDF and postscript; now the dream has come true in the official R, but what I was hoping for was an option as simple as
dev = 'png'
ordev = 'CairoJPEG'
- I wished multiple plots in a code chunk could be recorded instead of only the last one
- I wished there was a way to round the numbers in
Sexpr{}
other than writing expressions likeSexpr{round(x, 3)}
for each singleSexpr{}
- I wished I did not have to
print()
plots from ggplot2 and a simpleqplot(x, y)
would just give me a plot in Sweave - I wished users would never need instructions on
Sweave.sty
or run into troubles due to the fact that LaTeX cannot findSweave.sty
- I wished cacheSweave could print the results of a code chunk even if it was cached
- I wished brew could support graphics
- I wished R2HTML could support R code syntax highlighting
- ...
The package knitr was designed to give the user access to every part of the process of dealing with a literate programming document, so there is no need to hack at any core components if you want more freedom. I have gone through the source code of pgfSweave and cacheSweave for a couple of times, and I often feel uncomfortable with the large amount of code copied from official R, especially when R has a new version released (I will begin to worry if the add-on packages are still up-to-date with the official Sweave).
![Knit Knit](/uploads/1/2/6/1/126190102/576263483.png)
Usage
If options are not explicitly specified, knitr will try to guess reasonable default settings. A few manuals are available such as the main manual, the graphics manual, and the themes manual. For a more organized reference, see the knitr book.
Contributing
For very simple changes such as fixing typos, you can just edit the file by clicking the button
Edit
after you open the file online. For more complicated changes, you will have to manually create a pull request after forking this repository.To make sure you did not break anything, you need to run tests, which are done through the testit package. If you added any features, add your own tests in
tests/testit/
. You can run tests using make
, e.g.If you are lazy or do not understand what I said above, just forget about it. The simplest thing to do is to look at the
Commits
panel after you sent the pull request -- if you see green check marks ✔ on your commits, you are fine. Travis CI will run the tests automatically for me. If your pull request passes the tests, you see green check marks.License
This package is free and open source software, licensed under GPL.