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 https://yihui.org/knitr/1, 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] -0.66551 -0.15919 -0.39579 0.51043 0.66324 -1.89641 -0.88607 -1.14268
## [9] 1.20621 -0.27935 0.34695 -0.84119 -2.12532 -0.14571 -0.67523 -0.16504
## [17] 0.21255 0.21126 -0.03614 -0.14925
= lm(dist ~ speed, data = cars)
fit = coef(fit) b
Estimate | Std. Error | t value | Pr(>|t|) | |
---|---|---|---|---|
(Intercept) | -17.579 | 6.7584 | -2.601 | 0.0123 |
speed | 3.932 | 0.4155 | 9.464 | 0.0000 |
The fitted regression equation is \(Y=-17.5791+3.9324x\).
par(mar=c(4, 4, 1, .1))
plot(cars, pch = 20)
abline(fit, col = 'red')
A scatterplot with a regression line.
e.g. the main manual and the graphics manual↩︎