This is a special R script which can be used to generate a report. You can write normal text in roxygen comments.
First we set up some options (you do not have to do this):
The report begins here.
# boring examples as usual
set.seed(123)
x = rnorm(5)
mean(x)## [1] 0.1936
Now we continue writing the report. We can draw plots as well.
par(mar = c(4, 4, 0.1, 0.1))
plot(x)
Actually you do not have to write chunk options, in which case knitr will use default options. For example, the code below has no options attached:
var(x)## [1] 0.6578
quantile(x)## 0% 25% 50% 75% 100%
## -0.56048 -0.23018 0.07051 0.12929 1.55871
And you can also write two chunks successively like this:
sum(x^2) # chi-square distribution with df 5## [1] 2.818
sum((x - mean(x))^2) # df is 4 now## [1] 2.631
Done. Call spin('knitr-spin.R') to make silk from sow's ear now and knit a lovely purse.