Re: Bug: Can’t assign to hline relative reference

[Maxim Nikulin <manikulin@gmail.com>]

2020-10-23  Dante Catalfamo wrote:
> That seems to work for the most part, but now I'm experiencing a strange
> difference when evaluating. If I use a formula like
>   
> #+TBLFM:@2$3..@23$3=if($2!=0,12*$2,$3);%.2f::@24$2=vsum(@I..@II);%.2f::@24$3=vsum(@I..@II);%.2f
> 
> The column gets evaluated first, then the sum at the bottom gets
> evaluated, resulting in what I'd expect. But if I use a formula like
> 
> #+TBLFM:@<<$3..@>>$3=if($2!=0,12*$2,$3);%.2f::@24$2=vsum(@I..@II);%.2f::@24$3=vsum(@I..@II);%.2f
> 
> The sum gets calculated first, and the column after, meaning the sum
> doesn't reflect any changes made before calculation. I find this pretty
> strange considering the formulas are in the same order. Do formulas
> involving relative references get calculated last for some reason?

Interesting... However my curiosity is not strong enough to find 
appropriate place in the code.

Either I never tried such combination of references (I use @>$2=... for 
the last row) or I have not expected reliable evaluation order and just 
hit C-c C-c several times.

It seems that single cell formulas are calculated later than ranges

| a | c | b |
|---+---+---|
| 2 |   |   |
| 3 |   |   |
| 4 |   |   |
| 5 |   |   |
| 6 |   |   |
| 7 |   |   |
|---+---+---|
|   |   |   |
#+TBLFM: @<<$3..@>>$3=$1*2 :: @<<$2..@<<<$2=$3*3 :: @5$2..@6$2=$3*4 :: 
@4$2=$3*5 :: @>>$2=$3*6

| a |  c |  b |
|---+----+----|
| 2 |  0 |  4 |
| 3 |  0 |  6 |
| 4 |  0 |  8 |
| 5 |  0 | 10 |
| 6 |  0 | 12 |
| 7 | 84 | 14 |
|---+----+----|
|   |    |    |
#+TBLFM: @<<$3..@>>$3=$1*2 :: @<<$2..@<<<$2=$3*3 :: @5$2..@6$2=$3*4 :: 
@4$2=$3*5 :: @>>$2=$3*6

Notice zeroes for @<<..@<<< but not for @>>. Even more funny that 
@>>>>>>>$2..@>>>>>>$2=$3 instead of @<<$3..@<<<$3 give non-zero values 
for the second and third rows. Anyway I do not plan to memorize such rules.

By the way, I have noticed that @<<$3..@>>$3=... likely could be 
replaced by just $3=... and it is evaluated quite early in such form. 
Skimming through the manual previous times, I missed the point of 
"column formulas" https://orgmode.org/manual/Column-formulas.html or
[[info:org#Column formulas]] and have noticed the details just today.