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Re: [O] Interaction between org tables and embedded calc
From: |
Eric Schulte |
Subject: |
Re: [O] Interaction between org tables and embedded calc |
Date: |
Thu, 23 Aug 2012 10:45:46 -0600 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.2.50 (gnu/linux) |
Gilles Charron <address@hidden> writes:
> Hi,
>
> I recently discovered the beauty of emacs embedded calc. Works great inside
> org files for note taking with math & engineering related content.
>
> I've been trying to get org tables and embedded calc to coordinate with each
> other using assigned variables however it appears that embedded calc uses some
> sort of namespace for storing variables. Below is a sample of what I'm trying
> to do:
>
> Let's say I need to calculate something - I'll assign it to an embedded calc
> variable:
>
> myVariable := 1 + 0.5 => 1.5
>
> Now, embedded calc knows about "myVariable" . Next I would like to use this
> variable inside a org table (like offset all elements in a column with
> "myVariable"):
>
> | Data | Corrected Data (-myVariable) |
> | 0 | should yield -1.5 |
> | 1 | should yield -0.5 |
> | 2 | should yield 0.5 |
>
> I've been trying to use calc-eval along with evalv however they don't appear
> to
> resolve "myVariable".
>
> Reading though the embedded calc documentation:
>
>
> "The assignment operator `a := 17' does not actually do anything by itself.
> But
> Embedded Mode recognizes it and marks it as a sort of file-local definition of
> the variable."
>
> How can I access these "file-local definitions" through "calc-eval" or org
> tables? Essentially, I'm looking for an equivalent of org properties
> "$PROP_propertyName" which can be accessed in org tables.
>
This is an interesting question but to the extent that you're asking how
to resolve an embedded calc variable from general calc execution I think
this is more of a calc than an Org-mode question, and should be sent to
the calc mailing list.
>
> I would also like the ability to read from an org table and use the
> content later in a embedded math equation:
>
> | Data |
> |------|
> | 1 |
> | 2 |
> | 3 |
> |------|
> | 6 |
> #+TBLFM: @5$1=vsum(@I..II)
>
> Would like to read the results (6) and use it in a equation:
>
> MoreProcessing := $result + 1.234
>
> How would one go about doing this?
>
Assuming you know the syntax to specify vectors in embedded calc, you
could use a code block to read the table from Org-mode and output the
calc vector syntax into your document.
Best,
>
>
> Thanks!
> Gilles
>
>
--
Eric Schulte
http://cs.unm.edu/~eschulte