52 lines
1.3 KiB
Plaintext
52 lines
1.3 KiB
Plaintext
This is a special R script which can be used to generate a report. You can
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write normal text in roxygen comments.
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First we set up some options (you do not have to do this):
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```{r setup, include=FALSE}
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library(knitr)
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opts_chunk$set(fig.path = 'figure/silk-')
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```
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The report begins here.
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```{r test-a, cache=FALSE}
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# boring examples as usual
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set.seed(123)
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x = rnorm(5)
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mean(x)
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```
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You can use the special syntax {{code}} to embed inline expressions, e.g.
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`r mean(x) + 2`
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is the mean of x plus 2.
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The code itself may contain braces, but these are not checked. Thus,
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perfectly valid (though very strange) R code such as `{{2 + 3}} - {{4 - 5}}`
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can lead to errors because `2 + 3}} - {{4 - 5` will be treated as inline code.
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Now we continue writing the report. We can draw plots as well.
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```{r test-b, fig.width=5, fig.height=5}
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par(mar = c(4, 4, .1, .1)); plot(x)
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```
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Actually you do not have to write chunk options, in which case knitr will use
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default options. For example, the code below has no options attached:
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```{r }
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var(x)
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quantile(x)
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```
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And you can also write two chunks successively like this:
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```{r test-chisq5}
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sum(x^2) # chi-square distribution with df 5
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```
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```{r test-chisq4}
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sum((x - mean(x))^2) # df is 4 now
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```
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Done. Call spin('knitr-spin.R') to make silk from sow's ear now and knit a
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lovely purse.
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