I am trying the following:
#+TBLFM: @address@hidden = if("$3" == "nan", string(""), $3 - $2) ; %.1f
and:
#+TBLFM: @address@hidden = if("$3" == "", string(""), $3 - $2) ; %.1f
But in both case the fourth field is filled when the third field is empty. What am I doing wrong?
I am using version 8.2.1.
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Cecil Westerhof