Error in the units conversion in calc-embedded

Error in the units conversion in calc-embedded

[Kepa via Users list for the GNU Emacs text editor]

I try to simplify units to m^3/hr:

3 m^3 / s + 70 m^3 / hr

1. M-x calc-embedded
2. u c
     - Old units: m^3/s
     - New utis: m^3/hr

Result is OK, but units are wrong:

10870. m^3 / s

Re: Error in the units conversion in calc-embedded

[Michael Heerdegen via Users list for the GNU Emacs text editor]

Kepa via Users list for the GNU Emacs text editor
<help-gnu-emacs@gnu.org> writes:

> I try to simplify units to m^3/hr:
>
> 3 m^3 / s + 70 m^3 / hr
>
> 1. M-x calc-embedded
> 2. u c
>     - Old units: m^3/s
>     - New utis: m^3/hr
>
> Result is OK, but units are wrong:
>
> 10870. m^3 / s

Hmm - the correct result 10870 m^3 / hr - so the result from Calc is
mathematically wrong.  calc-embedded is not related, this happens in
"standard" Calc also.

Could you please make a bug report?

BTW, you should get the correct result when you first simplify units (u
s) and convert afterwards.  Unit conversion seems to get confused
when the expression is a sum of summands in different units.


TIA,

Michael.

Re: Error in the units conversion in calc-embedded

[Michael Heerdegen]

Michael Heerdegen via Users list for the GNU Emacs text editor
<help-gnu-emacs@gnu.org> writes:

> Could you please make a bug report?

Done.

Michael.