From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael Brand <michael.ch.brand@gmail.com>
Subject: Re: How to put a Greek sigma into the spreadsheet?
Date: Mon, 3 Jun 2013 14:18:33 +0200
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To: Marcin Borkowski <mbork@wmi.amu.edu.pl>
Cc: Org-mode mailing list <emacs-orgmode@gnu.org>

Hi Marcin

On Mon, Jun 3, 2013 at 12:53 PM, Marcin Borkowski <mbork@wmi.amu.edu.pl> wr=
ote:
> basically the subject has it.  While :=3Dstring("asdf")
> works, :=3Dstring("=CE=A3") does not.  I suspect the reason is that this =
is
> not an ASCII symbol.  Is there a way to get around this problem?

The function "string" of Calc does not support characters above 127,
see towards the end of
(info "(calc) Strings")
or
http://www.gnu.org/software/emacs/manual/html_node/calc/Strings.html

If I understand your example you can use just

| item | value |
|------+-------|
| a    |     1 |
| b    |     2 |
|------+-------|
| =E2=88=91    |     3 |
#+TBLFM: @>$2 =3D vsum(@I..@>>)

or

| item | value |
|------+-------|
| a    |     1 |
| b    |     2 |
|------+-------|
|      | =E2=88=91 =3D 3 |
#+TBLFM: @>$2 =3D vsum(@I..@>>); =E2=88=91 =3D %d

Michael