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Re: Display Engineering Notation with SI Prefix

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On 30/08/2024 4:30 pm, mhx wrote:
> On Fri, 30 Aug 2024 2:13:43 +0000, dxf wrote:
> [..]
>>> 3 set-precision  ok
>>> -1e 0e 0.5e 0e z^ z.  0.0000000000000000612 + i1.  ok
> [..]
>> Can't say without knowing what was the criteria.  If a user wants
>> to show the result to 3 significant digits, who can argue with that.
>> 3 significant digits is about right for (ENG.) applications.
> 
> When the user wants 3 significant digits according to the mathematical
> definition there is no discussion that SET-PRECISION is appropriate.
> 
> If a system is to produce 100 Watts, and an approximate model of the
> losses returns 0.0000000000000000612 Watts, then that is quite probably
> not the wanted output (because it tells you the resolution of the
> floating point package, not the accuracy of the approximation).
> However, when that same model returns 100 Watts for the full output
> power, 100 or 100.0 is (probably) the expectation. Extra steps are
> needed
> to print the losses in a useful way, and those steps match perfectly
> with PLACES. PLACES would also work to print the full power as 100.
> It is not ideal, but the reason it is not ideal has nothing to do with
> SET-PRECISION .

If the argument is certain apps work well with PLACES (or equivalent)
I can accept that.  Because Fortran and C had it from the beginning
I felt it was important to provide it.  At the same time I also found
SET-PRECISION to be useful.  I can't imagine FE. being used with
anything but SET-PRECISION.  So for me, an fp package needs to offer
both schemes.

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Display Engineering Notation with SI Prefix dxf <dxforth@gmail.com> - 2024-08-29 01:32 +1000
  Re: Display Engineering Notation with SI Prefix dxf <dxforth@gmail.com> - 2024-08-29 20:02 +1000
    Re: Display Engineering Notation with SI Prefix mhx@iae.nl (mhx) - 2024-08-29 10:39 +0000
      Re: Display Engineering Notation with SI Prefix dxf <dxforth@gmail.com> - 2024-08-29 22:39 +1000
        Re: Display Engineering Notation with SI Prefix mhx@iae.nl (mhx) - 2024-08-29 14:23 +0000
          Re: Display Engineering Notation with SI Prefix dxf <dxforth@gmail.com> - 2024-08-30 12:13 +1000
            Re: Display Engineering Notation with SI Prefix mhx@iae.nl (mhx) - 2024-08-30 06:30 +0000
              Re: Display Engineering Notation with SI Prefix dxf <dxforth@gmail.com> - 2024-08-30 18:03 +1000
                Re: Display Engineering Notation with SI Prefix mhx@iae.nl (mhx) - 2024-08-30 08:26 +0000
                Re: Display Engineering Notation with SI Prefix dxf <dxforth@gmail.com> - 2024-08-30 19:24 +1000
                Re: Display Engineering Notation with SI Prefix dxf <dxforth@gmail.com> - 2024-08-31 11:11 +1000

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