reading files with lisp

Programmer in training here I'm trying to find some sample files that
show me how to read data from a text file. The file is in the format:
1,2,3,4
2,2,3,4
3,2,3,4

This is the lisp I am starting with:
(setq f (open (strcat path fileName) "r"))
(while
(setq data (read-line f)))

Anyone have something similar I could look at to see how to put this into a
list or manipulate the data properly? Or I hope you can at least point me in
the right direction and let me know what to search for.

Thanks a bunch,
kemp

 

Well, you are headed in the right direction. Here's an expansion of your
code that will return a list of lists....turning each line into a list,
then lists them together.

(setq f (open (findfile "test.txt") "r"))
(while (setq data (read-line f))
(setq data (str2list data ","))
(setq datalist (cons data datalist))
)
(setq datalist (reverse datalist))
(close f)

This will return, using your short file sample:

(("1" "2" "3" "4") ("2" "2" "3" "4") ("3" "2" "3" "4"))

HTH,
Jeff

Oh, yeah, the (str2list) is a function written by John Uhden. It is
posted in many of the previous messages, if you can't find it here, I
know it's available at www.cadlantic.com, under the "free stuff".