I have the following table and formular and wonder why the first one doesn' work:

| data | number1 | number2 | delta | |-------+---------+---------+-------| | data1 | 23 | 4 | -92 | | data2 | 4 | 0 | 0 | | data3 | 1 | 0 | 0 | #+TBLFM: $4=(- $2 $3) 

But when I do:

| data | number1 | number2 | delta | |-------+---------+---------+-------| | data1 | 23 | 4 | 19 | | data2 | 4 | 0 | 4 | | data3 | 1 | 0 | 1 | #+TBLFM: $4=(+ $2 -$3) 

It works as expected.

Even in debug-mode I don' understand why in column 1 (- $2 $3) is -92 and not 19. (and why the others are 0 in the first example)