-- re-sending as I received delivery failure. Apologies for multiple responses. --
You need to typecast the variable in expression for precision. [dpanwar@UnixServer1 NS]$ ns % set a 18 18 % set b 1000 1000 % set x [expr double($a)/$b] 0.017999999999999999 To truncate the large float values, you may need to set the* tcl_precision* variable and get the desired result. % set tcl_precision 10 10 % set x [expr double($a)/$b] 0.018 With best regards, Deepak Panwar ---------------------- *"Effort is important, but knowing where to make an effort makes all the difference!"* On Wed, Feb 19, 2014 at 11:14 AM, Deepak Panwar <deepakdeeppan...@gmail.com>wrote: > > You need to typecast the variable in expression for precision. > > > [dpanwar@UnixServer1 NS]$ ns > > % set a 18 > 18 > % set b 1000 > 1000 > % set x [expr double($a)/$b] > 0.017999999999999999 > > > To truncate the large float values, you may need to set the* > tcl_precision* variable and get the desired result. > > % set tcl_precision 10 > 10 > % set x [expr double($a)/$b] > 0.018 > > > With best regards, > Deepak Panwar > ---------------------- > *"Effort is important, but knowing where to make an effort makes all the > difference!"* > > > > On Wed, Feb 19, 2014 at 6:30 AM, <ns-users-requ...@isi.edu> wrote: > >> Send Ns-users mailing list submissions to >> ns-users@isi.edu >> >> To subscribe or unsubscribe via the World Wide Web, visit >> http://mailman.isi.edu/mailman/listinfo/ns-users >> or, via email, send a message with subject or body 'help' to >> ns-users-requ...@isi.edu >> >> You can reach the person managing the list at >> ns-users-ow...@isi.edu >> >> When replying, please edit your Subject line so it is more specific >> than "Re: Contents of Ns-users digest..." >> >> Today's Topics: >> >> 1. arithmatic in TCL for ns2 (Muhammad Imran KHAN) >> 2. Re: running configuration..Installation of tclcl seems >> incomplete or can't be found automatically. (knudfl) >> >> >> ---------- Forwarded message ---------- >> From: Muhammad Imran KHAN <exceptional_attract...@yahoo.com> >> To: ns-users <ns-users@isi.edu> >> Cc: >> Date: Tue, 18 Feb 2014 09:25:32 +0000 (GMT) >> Subject: [ns] arithmatic in TCL for ns2 >> Hi , >> I have some problem regarding arithmatic expressions. >> I have prepared a file .tcl and then I include it in main ns simulator >> file. >> For example, >> >> set x [expr $a / $b] >> ie. >> x = 18 /1000 , it gives me zero value rather than 0.018. Why ? >> what should I do Please? to get exact 0.018 . >> >> Thanks you so much for your kind help. >> >> Best Regards, >> Imran Khan >> >> >>
