that is simpler, indeed :) <div class="gmail_quote">On Sun, Nov 8, 2009 at 10:02, Jos Koot <<a href="mailto:jos.koot@telefonica.net">jos.koot@telefonica.net</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Why not using just read? For the first read you would find: (read port) --> 2.5500000e-002 If your file contains numers only: ; read a file containing numbers and return the list of these numbers. (define (read-file-of-numbers port) ; unchecked code! (let ((item (read port))) (if (eof-object item) '( ) (cons item (read-file-of-numbers port))))) In fact the above routine can be used for any file that contains a sequence of sexprs and would return a list of the sexprs. Jos ----- Original Message ----- From: <<a href="mailto:krhari@ccs.neu.edu" target="_blank">krhari@ccs.neu.edu</a>> To: "plt-scheme" <<a href="mailto:plt-scheme@list.cs.brown.edu" target="_blank">plt-scheme@list.cs.brown.edu</a>> Sent: Sunday, November 08, 2009 8:41 AM Subject: [plt-scheme] How to get tokenize a string?<div><div></div><div class="h5"> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi, I have a file which contains data like this 2.5500000e-002 3.6238983e-002 2.5500000e-002 3.6238638e-002 2.5500000e-002 3.6237603e-002 ... I am working on a small animation I need these numbers to calculate some things there... I am using 2htdp/universe teachpack... I actually found string->tokenize function in SRFI doc... Can I use it? If yes can anyone guide me how to use SRFI? If no is there any other way out other than converting the file into a string then using sting->list and doing it in brute force way? If I use file->string, I get a string like this " 2.5500000e-002 3.6238983e-002\r\n 2.5500000e-002 3.6238638e-002\r\n 2.5500000e-002 3.6237603e-002\r\n" Please help me out... Thanks Hari _________________________________________________ For list-related administrative tasks: <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme" target="_blank">http://list.cs.brown.edu/mailman/listinfo/plt-scheme</a> </blockquote> _________________________________________________ For list-related administrative tasks: <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme" target="_blank">http://list.cs.brown.edu/mailman/listinfo/plt-scheme</a> </div></div></blockquote></div>