This is a knitr-specific question, and you are probably better off
posting to the stackoverflow knitr questions site,
http://stackoverflow.com/questions/tagged/knitr
Nonetheless, here is what I use to add an output.lines options to chunk
output. This works for me using LaTeX output; you can try it with
markdown...
# knitr hook function to allow an output.lines option
# e.g.,
# output.lines=12 prints lines 1:12 ...
# output.lines=1:12 does the same
# output.lines=3:15 prints lines ... 3:15 ...
# output.lines=-(1:8) removes lines 1:8 and prints ... 9:n ...
# No allowance for anything but a consecutive range of lines
hook_output <- knit_hooks$get("output")
knit_hooks$set(output = function(x, options) {
lines <- options$output.lines
if (is.null(lines)) {
return(hook_output(x, options)) # pass to default hook
}
x <- unlist(strsplit(x, "\n"))
more <- "..."
if (length(lines)==1) { # first n lines
if (length(x) > lines) {
# truncate the output, but add ....
x <- c(head(x, lines), more)
}
} else {
x <- c(if (abs(lines[1])>1 | lines[1]<0) more else NULL,
x[lines],
if (length(x)>lines[abs(length(lines))]) more else NULL
)
}
# paste these lines together
x <- paste(c(x, ""), collapse = "\n")
hook_output(x, options)
})
On 10/4/2014 11:08 AM, Teis M. Kristensen wrote:
Hi all,
I am writing here because I would like to limit the number of lines that are
produced from a function when I knit my markdown document in R.
The code is written down as following and gives 50+ lines of data when run. My
goal is to only have 9 lines of code produced by the sedist function.
```{r, results=1:9}
sedist(FILENAME, method="correlation")
```
I have tried using {r, message=1:9}, {r, Hide=1:9} and similar.
Please let me if you have a solution.
Best,
Teis Moeller Kristensen
School of Communication and Information
Rutgers University
Office ANX A - 103
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