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August 20, 2015 04:50
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TextMate R language grammar demo with number tick number plus for stack
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#' 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): | |
#+ setup, include=FALSE | |
library(knitr) | |
opts_chunk$set(fig.path = 'figure/silk-') | |
#' The report begins here. | |
#+ test-a, cache=FALSE | |
# boring examples as usual | |
set.seed(123) | |
x = rnorm(5) | |
mean(x) | |
#' You can use the special syntax {{code}} to embed inline expressions, e.g. | |
{{mean(x) + 2}} | |
#' is the mean of x plus 2. | |
#' The code itself may contain braces, but these are not checked. Thus, | |
#' perfectly valid (though very strange) R code such as `{{2 + 3}} - {{4 - 5}}` | |
#' can lead to errors because `2 + 3}} - {{4 - 5` will be treated as inline code. | |
#' | |
#' Now we continue writing the report. We can draw plots as well. | |
#+ test-b, fig.width=5, fig.height=5 | |
par(mar = c(4, 4, .1, .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) | |
quantile(x) | |
#' And you can also write two chunks successively like this: | |
#+ test-chisq5 | |
sum(x^2) # chi-square distribution with df 5 | |
#+ test-chisq4 | |
sum((x - mean(x))^2) # df is 4 now | |
#' Done. Call spin('knitr-spin.R') to make silk from sow's ear now and knit a | |
#' lovely purse. | |
# /* you can write comments between /* and */ like C comments (the preceding # | |
# is optional) | |
Sys.sleep(60) | |
# */ | |
# /* there is no inline comment; you have to write block comments */ |
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