Re: Yet another literate programming application

[Eric Schulte <schulte.eric@gmail.com>]

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Alan Schmitt <alan.schmitt@polytechnique.org> writes:

> schulte.eric@gmail.com writes:
>
>> Alan Schmitt <alan.schmitt@polytechnique.org> writes:
>>
>>> Or rather, I should say a literate algebra and calculating application:
>>> http://calca.io/
>>>
>>
>> If this is appealing, it may be worth checking out the "Embedded Mode"
>> of Emacs calc [1].  From what I can tell on the calc.io website, Emacs
>> calc provides the same functionality, but Emacs calc has the benefits of
>> (1) it is open source meaning you can confirm calculations and your
>> answers (in my opinion a must for any peer reviewed publication), and
>> (2) it may be embedded in *any* type of file.
>
> Embedded calc mode is amazing, thanks for the link! It does not seem as
> intuitive to work with equations (I've tried doing the Functions and
> Solving Equations examples in calc),

Very cool, thanks for sharing.  I would note, that one nice thing about
embedded mode is that there is no need for the #+begin/end_src calc
blocks, rather the formulas may be placed directly in the Org-mode file.
So to re-write a small portion of your previous example...


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#+Title: Emacs Calc Embedded Mode Examples

* Temperature Conversion (solving equations)
Conversion from Celsius to Fahrenheit involves multiplication by 1.8
and the addition of 32 as shown below.

eq := f = 1.8 c + 32

Solving for Celsius from Fahrenheit is then.

ceq := solve(eq, c) =>

So, if we know that water boils at 100\deg Celsius, we can find the
boiling point of water in Fahrenheit.

subst(eq, c, 100) =>

Or if we know that paper burns at 451\deg Fahrenheit, we can find the
burning point of paper in Celsius.

subst(ceq, f, 451) =>

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Using embedded mode is still fairly awkward for me.  I would benefit
greatly from some sort of quick reference card explaining the key
bindings and maybe an easier way to switch to/from embedded mode.

> and there are funny results with spaces in names. If someone knows how
> to do the even/odd example in calc, please let me know. Here is what I
> got so far:
>

I'm not clear on how the even/odd example works in calc, could you share
a link to the specific manual page you're referencing?  I've long felt
that calc would be a *very* powerful tool, if only I could climb the
learning curve.

Thanks,

-- 
Eric Schulte
http://cs.unm.edu/~eschulte