Re: how to add a range of columns

[Eric S Fraga <e.fraga@ucl.ac.uk>]

On Friday,  2 Jul 2021 at 11:23, Uwe Brauer wrote:
> No I only want to add the parts of column $1 and $2 that are between the
> two hlines

Okay; problem 1 is that org formulas are not really vector based: a
range on the left hand side says that each element in the range will be
assigned the outcome of the right hand side so the right hand side
should not be a vector.

> (I wanted to use hline @I and @II and not the explict row
> numbers, since this is more convenient. But it does to work with
> explicit row numbers 

Yes, you cannot use @I etc. in the range definition for the target.

I can think of 2 options.  First, you can use relative addressing, i.e.:

#+TBLFM: @<<$3..@>>$3=$1+$2

where @<< means the second row and @>> the second last row.

Alternatively, you can introduce a new column at the start and use the
"Advanced Features" of the spreadsheet described in the info manual
section

(org) Advanced features

which will allow you to specify which rows should be evaluated (see the
* option).

HTH,
eric

-- 
: Eric S Fraga via Emacs 28.0.50, Org release_9.4.6-577-gf76d4d
: Latest paper written in org: https://arxiv.org/abs/2106.05096