问题
I have done 2000 analyses, each named by a string containing spaces, numbers, and parentheses, and every analysis has produced three (vector) pdf files. For example, for analysis John Doe 7 (m) I have the following pdfs: John Doe 7 (m)_upper_left.pdf, John Doe 7 (m)_upper_right.pdf, John Doe 7 (m)_lower.pdf as want to make a one-page pdf file for John Doe 7 (m), where they are arranged as follows in John Doe 7 (m)_whole:
And do this for all other analyses (Jake Levinson
12 (k), ...), and have 2000 single-page, three-panel pdf files. As I asked earlier, I tried doing this in R for one analysis (so I can do it for other files) but the problem is R converts the plots into bitmap while reading them.
I'm on windows and have pdftk on my machine (if that helps). Is there a neat way of doing it using command line or something else? Thanks.
来源：https://stackoverflow.com/questions/57027588/put-multiple-pdfs-on-none-page-and-repeat-this-for-a-list-of-files