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Re: Printing numbersDavid Bailey,

  • To: mathgroup at
  • Subject: [mg54702] Re: Printing numbersDavid Bailey,
  • From: Steve Gray <stevebg at>
  • Date: Sun, 27 Feb 2005 01:29:44 -0500 (EST)
  • References: <cvhhj7$rdr$>
  • Sender: owner-wri-mathgroup at

Actually PaddedForm is closest to what I wanted. I wasn't aware of it due to  conscientious but not
quite adequate  searching in Help and  in 4 books. Thanks to everyone who answered.

Steve Gray

On Wed, 23 Feb 2005 09:15:19 +0000 (UTC), David Bailey <dave at> wrote:

>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

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