From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thorsten Jolitz <tjolitz@gmail.com>
Subject: Re: using a simple numerical variable in an org text ocument
Date: Thu, 25 Jul 2013 23:55:53 +0200
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References: <CAN_Dec-gkQnop2+AnwM89XsfotJi-WhLshxomBw7QivyWtmSfg@mail.gmail.com>
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Matt Price <moptop99@gmail.com> writes:

> Hi,
>
> I'm making a very simple org-document -- a packing list for a trip.
> It has entries like
>
> - 4 mugs
> - for sleeping bags
> - 4 thermarest pads
>
>
> I'd like to replace the numbers there by a variable -- so if I make a
> list for 4 people, the number displayed will be '4'; but if the list
> is for 2 people, the number displayed will be 2.  Better would be if I
> could also do simple arithmetic manipulations (x * 6 dinners for a
> week...).  I there a really simple way to do this? if it's not really
> easy, it won't really seem worth it, but if it is really easy, I will
> use it a lot...


Use a table with a named reference, e.g. stored as subtree property. See
[[http://orgmode.org/org.html#The-spreadsheet][Spreadsheets]].

,--------------------------------
| * My Trip
|   :PROPERTIES:
|   :people:   4
|   :END:
|
| | item       | factor | total |
| |------------+--------+-------|
| | toothbrush |      1 |     4 |
| | socks      |      4 |    16 |
| #+TBLFM: $3=$2*$PROP_people
`--------------------------------

--
cheers,
Thorsten