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Is it possible to do calculations with GNU Octave using measuring units? (lemmy.kde.social)

submitted 11 months ago by tubbadu@lemmy.kde.social to c/opensource@lemmy.ml

9 comments fedilink hide all child comments

Hello! In qalc I can do calculations using measuring units like this:

> 5 W * 3 s

  (5 watts) × (3 seconds) = 15 J

I'd like to be able to do something similar also in GNU Octave. I think the symbolic library could be a place to look at, but I found nothing "already done". Do any of you know of a way to achieve this functionality?

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[–] Successful_Try543@feddit.de 6 points 11 months ago* (last edited 11 months ago) (5 children)

The Octave miscellaneous package has embedded GNU units as a function which should be helpful.

[–] tubbadu@lemmy.kde.social 3 points 11 months ago (4 children)

It looks interesting, but more focused on conversions than actual operations it seems:

octave:37> a.value = 100
a =

  scalar structure containing the fields:

    value = 100
    unit = W

octave:38> a.unit = 'W'
a =

  scalar structure containing the fields:

    value = 100
    unit = W

octave:39> b.value = 3
b =

  scalar structure containing the fields:

    value = 3
    unit = s

octave:40> b.unit = 's'
b =

  scalar structure containing the fields:

    value = 3
    unit = s

octave:41> a*b
error: binary operator '*' not implemented for 'scalar struct' by 'scalar struct' operations

[–] Successful_Try543@feddit.de 4 points 11 months ago (3 children)

I think I've found a solution. Matlab has implemented symunits in the symbolic toolbox and I've found the original? on Github. Hopefully it is compatible to GNU Octave.

[–] tubbadu@lemmy.kde.social 4 points 11 months ago

This looks very VERY promising! I'll try to install it tomorrow and Post here the results! Thanks?

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