Not An Introduction to knitr

Yihui Xie

2016-08-11

The knitr package (Xie 2016) is an alternative tool to Sweave based on a different design with more features. This document is not an introduction, but only serves as a placeholder to guide you to the real manuals, which are available on the package website http://yihui.name/knitr¹, and remember to read the help pages of functions in this package. There is a book (Xie 2015) for this package, but it may not be useful to those who prefer digging out information on the web.

Anyway, here is a code chunk that shows you can compile vignettes with knitr as well using R 3.0.x, which supports non-Sweave vignettes:

options(digits = 4)
rnorm(20)

##  [1]  0.22419 -1.15103 -0.73301  0.67108 -0.45608 -1.60370 -1.86274
##  [8] -0.94567 -0.89729 -0.66638 -0.45954 -1.71849  0.79256  0.43149
## [15]  0.63352 -0.54668  0.21352  0.34603 -0.61295  0.01952

fit = lm(dist ~ speed, data = cars)
b = coef(fit)

The fitted regression equation is \(Y=-17.5791+3.9324x\).

par(mar = c(4, 4, 1, 0.1))
plot(cars, pch = 20)
abline(fit, col = "red")

A scatterplot with a regression line.