From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael Brand <michael.ch.brand@gmail.com>
Subject: Re: problem with empty column
Date: Fri, 5 Jan 2018 14:55:33 +0100
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References: <87h8s0yaj5.fsf@mat.ucm.es> <87zi5sk5ru.fsf@gmail.com>
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To: Org Mode <emacs-orgmode@gnu.org>

Hi Uwe

On Fri, Jan 5, 2018 at 1:44 PM, Uwe Brauer <oub@mat.ucm.es> wrote:

> But fails if there is a row like this
>
> | Name   | E1 | E2 | E3 | E4 | Res |
> |--------+----+----+----+----+-----|
> | Entry1 |    |    |    |    |  NP |
> | Entry2 | 10 | 20 | 30 | 40 |  10 |
> | Entry3 | 10 |    | 20 | 30 | nan |
> #+TBLFM: $6=if("$2" == "nan", string("NP"),($2+$3+$4+$5)/10);E

I think you are looking for this:

    | Name   | E1 | E2 | E3 | E4 | Res |
    |--------+----+----+----+----+-----|
    | Entry1 |    |    |    |    | NP  |
    | Entry2 | 10 | 20 | 30 | 40 | 10  |
    | Entry3 | 10 |    | 20 | 30 | NP  |
    #+TBLFM: $6 = if(typeof(vsum($2..$5)) == 12 , string("NP"),
vsum($2..$5) / 10); E

See the example

    if(typeof(vmean($1..$7)) == 12, string(""), vmean($1..$7); E

in the manual.

Michael