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From: Benjamin Beckwith <bnbeckwith@gmail.com>
To: emacs-orgmode@gnu.org
Subject: Field coordinates and moving averages
Date: Tue, 15 Nov 2011 10:21:40 -0500	[thread overview]
Message-ID: <878vnhpfw5.fsf@bnbeckwith.com> (raw)


I'm trying to create a table of periodic data and calculate a moving
average in an adjacent column.  I was trying to use field coordinates,
but they do not work how I would like them to work.

Here is what I have for a 5-day moving average:

| Daily Data | Moving Average |
|------------+----------------|
|         10 |                |
|         11 |                |
|         12 |                |
|         13 |                |
|         14 |                |
|         14 |                |
|         16 |                |
#+TBLFM: $2=if(@# >=7, vmean(@-5$1..@0$1),string(""));

I expeced the if(@# >=7..) to protect the sub-clauses from executing
unless the predicate is true.  However, that is not the case.  When I
try to execute this formula, I receive the error: "Row descriptor -5
used in line ### leads outside table".

I can see how this is true if the ranges are checked for every entry.
Is there a better way for me to write this column forumla?  Is this a
limitation in the field coordinates?

Thanks,
Ben

next             reply	other threads:[~2011-11-15 15:35 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-11-15 15:21 Benjamin Beckwith [this message]
2011-11-15 15:52 ` Field coordinates and moving averages Nick Dokos
2011-11-15 19:16   ` Michael Brand

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