Hi
I have the following table #+begin_src elisp #+NAME: test | Name | E1 | E2 | E3 | Result1 | Result2 | Final | |-------+----+----+-----+---------+---------+-------| | User1 | | | | | 8 | nan | | User2 | | | | | | | | User3 | 1 | 0 | 3.5 | 4.5 | 5.8 | 4.8 | |-------+----+----+-----+---------+---------+-------| #+TBLFM: $5=if(typeof(vsum($2..$4)) == 12, string(" "),vsum($2..$4));E f-1::$7=if("$6" == "nan", string(" "),0.3*$5+0.6*$6); E f-1 #+end_src The calculations for User2 and 3 are fine, but for User1, the final result is a "nan". I see the problem is caused by ; E f-1 I don't understand why because As in #+begin_src elisp | user1 | User2 | | |-------+-------+-----| | | 3 | nan | | 0 | 1 | 0.8 | #+TBLFM: $3=0.2*$1+0.8*$2; E f-1 #+end_src I am not sure, but should I use something like if("$5" == "nan", string(" "),0.6*$6); E;f-1 But how can I combine both ifs, I am puzzled Any help is strongly appreciated. Uwe Brauer