This discussion is getting side tracked.
The real complaint here is that
{{#expr:(0.00007 * 1000 * 1000) mod 1000}} is giving 69 when it should give 70.
This is NOT a formatting issue, but rather it is bug in the #expr
parser function, presumably caused by some kind of round-off error.
-Robert Rohde
On Sat, Jan 31, 2009 at 2:27 PM, Greg L <[email protected]> wrote:
> Yes, {val} is a tool for making attractive and convenient scientific
> notation. The look of {{tl|val}} was discussed at length on both
> WT:MOSNUM and WT:MOS and achieved broad support for how it works and
> renders numbers. It delimits numbers with narrow spaces that aren't
> really "spaces"; they use CSS <span> tags to move characters. Thus,
> the significands can be copied and pasted into Excel where they will
> be treated as real numbers without the need to first hand-delete spaces.
>
> The problem with it {val} is outlined here at…
>
> http://en.wikipedia.org/w/index.php?title=User_talk:Jimbo_Wales&oldid=260819871
> -
> Developer_support_for_parser_function
>
> In a nutshell, about 5 to 10% of the time, {val} gives rounding
> errors. For instance, the expression {{val|0.55007|e=6}} will return
> a significand of 0.550069.
>
> This is the product of the buggy math-based parser functions it must
> use. To date, notwithstanding that Jimbo is solidly behind this, and
> that Erik supports the production of the required parser function, no
> volunteer developer has stepped up to the plate with a parser function
> that can character-counting parser function.
>
> Greg
>
>
> On Jan 31, 2009, at 2:17 PM, Platonides wrote:
>
> Greg L wrote:
>> All,
>>
>> Can anyone figure out how to fix {{tl|val}} so an expression like
>>
>> {{val|0.55007|e=6}}
>>
>> …works properly?
>>
>> Greg L
>
>
> You can't figure out what it should do just from the description.
> I imagine you mean http://en.wikipedia.org/wiki/Template:Val "Set of
> templates that can be used to easily present values in scientific
> notation, including uncertainty"
> Another ugly template...
>
>
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