asis_output does not work in loop

[renkun-ken]

In a normal Rmd document, the following code works:

asis_output("## hello\n")  

but this does not work:

for (i in 1:3) {
  asis_output("## hello\n\n")  
}

When I try to create a group of knit_printable objects in a for-loop, it can be very unnatural to print every object. Is it possible to make it easier to do so?

[yihui]

Unfortunately no, it is not possible. asis_output() only works in top-level R expressions. To create as-is output from a loop, you have to either use the chunk option results = 'asis' (but this option applies to all output in this code chunk, i.e. you cannot have both as-is output and verbatim output in the same chunk), or collect the character results in a loop, and write them out using asis_output() after the loop.

[renkun-ken]

Thanks for the explanation!

[1beb]

knit_expand is also a good solution to this type of expansion problem. You can use a template and cycle your code through over and over.

[github-actions]

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