Re: Using constants in columns

[Guido Van Hoecke <guivho@gmail.com>]

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Hi Eric,

Thanks for the suggestions, I'll go for the integer value used as an index
:)

Have a nice weekend,


Guido

On 16 October 2015 at 15:48, Eric S Fraga <e.fraga@ucl.ac.uk> wrote:

> On Friday, 16 Oct 2015 at 14:39, Guido Van Hoecke wrote:
> > Hi,
> >
> > Is there a way to use a constant directly in a table column?
> > I need to have a table where one of the columns can have one out of three
> > possible values and wanted to use constants for this.
> > From the following minimal example it appears that constants are only
> > possible in formulas, or am I missing something?
> >
> > #+CONSTANTS: vat=1.21
> > | 12.34 | $vat | #ERROR | 14.9314 |
> >
> > #+TBLFM: $3=$1*$2::$4=$1*$vat
> >
> > Using the $vat constant directly from the content of column 3 produces an
> > error, using it from a formula works fine.
> >
> > If this is the way it is, I'll have to write a formula for each row of
> the
> > column, that'd be a real pitty...
>
> Maybe not pretty but for a small number of alternatives, you could do:
>
> #+begin_src org
>   ,#+constants: vat=[1.15,1.21,1.40]
>   | amount | vat1 | vat2 | vat3 |   total |
>   |--------+------+------+------+---------|
>   |  12.34 |    1 |    0 |    0 |  14.191 |
>   |  56.78 |    0 |    1 |    0 | 68.7038 |
>   ,#+TBLFM: $5=$1*vsum($2..$4*$vat)
> #+end_src
>
> alternatively, you could have an integer value in the VAT column and use
> that to index the vector of VAT values?
> --
> : Eric S Fraga (0xFFFCF67D), Emacs 25.0.50.2, Org release_8.3.2-161-gd2ac25
>

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