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To change the leading characters for the output a knitr chunk in .Rmd has a comment option, like
```{r comment = ""}
1:100
```
Is there a way to set this globally, not separately for every chunk?
opts_knit$set(comment = "")
does not work and I cannot find it anywhere in the documentation.
444
After drag the lines you want to make comment, press SHIFT + CMD + C (macOS), SHIFT + CTRL + C (Windows). This is the shortcut of R Markdown editor (R Studio) to comment out.
There are two ways to render an R Markdown document into its final output format. If you are using RStudio, then the “Knit” button (Ctrl+Shift+K) will render the document and display a preview of it. Note that both methods use the same mechanism; RStudio's “Knit” button calls rmarkdown::render() under the hood.
On a new line, type: [//]: (This is my fuarking comment!)
The first code chunk: ```{r setup, include=FALSE} knitr::opts_chunk$set(echo = TRUE) ``` is used to specify any global settings to be applied to the R Markdown script. The example sets all code chunks as “echo=TRUE”, meaning they will be included in the final rendered version.
Use opts_chunk$set() because that is a chunk option; opts_knit is for package options (sorry about the similar names which apparently confused you). See http://yihui.name/knitr/options
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