create additional artifacts for an unknown number of new files

Original user request:

Suppose you have an R file which generates a set of outputs: for example pictures which need to appear in a LaTeX document. But instead of there being a fixed number of outputs, the number is under control of the R file. For example, there might be 15 pngs output, because, say, the input data happens to have 15 dimensions. Ideally the LaTeX document would adjust itself automatically to display all the output, rather than there being a fixed number of jinja tags in it. Is there some straightforward way to achieve this?