Re: Printing numbersDavid Bailey,dbaileyconsultancy.co.uk
- To: mathgroup at smc.vnet.net
- Subject: [mg54558] Re: Printing numbersDavid Bailey,dbaileyconsultancy.co.uk
- From: David Bailey <dave at Remove_Thisdbailey.co.uk>
- Date: Wed, 23 Feb 2005 03:11:30 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Steve Gray wrote: > 1. Can anyone tell me why these results are what they are? Neither answer is what I would expect, > which is 10. The two strings are the same length. > > Print[StringLength[ToString[123.456789]], " ", > StringLength[ToString[1234567.89]]]; > 7 22 > > 2. Is there a simple, easily available or self-evident way to get numbers printed out such that the > total number of spaces occupied by the print before the decimal point is some fixed, user-specified > amount, the number of spaces occupied after the decimal point is a different user-specified amount, > and the number of spaces following the number is a third user-specified amount. The goal is to > easily produce aligned columns of numerical printing, which would seem to be the most trivial task > in neat number printing. > For example if the function is called fprint, fprint[345.678,4,5,6] would print 4 spaces > followed by 5 character positions to the left of the point (00345 or (2 spaces)" 345", specified by > another argument), and 6 to its right. So fprint[345.678,4,5,6] would print (4 spaces)(2 > spaces)"345.678"(3 spaces), or if desired (4 spaces)(2 spaces)"345.678000"(no spaces), the total > taking up 16 positions. Also fprint[-345.678,4,5,6] would print (4 spaces)(1 space)"-345.678"(3 > spaces), also taking 16 positions, with the decimal points aligned with the first example. > Help is not that helpful, implying that I have to write one or find it somewhere. As I > recall, C provides an easy way to do this by setting arguments to Print. > Leads would be appreciated. > > Steve Gray > > Lookup NumberForm, ScientificForm and EngineeringForm David Bailey dbaileyconsultancy.co.uk