Symbolic math in pure ruby

[Ravil Bayramgalin]

http://github.com/brainopia/symbolic - for people interested in symbolic
math in pure ruby, i would love contribution from community.

 

[Benoit Daloze]

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That looks really cool, thanks!

I began something like that some time ago.

Remembering I had some awful:
module MathExp
class Function
def self.sq(x = nil) Function.newsq, x, '2x', 'x^3/3') end

I was using String for functions, as I didn't know yet the power of coerce.
But that was quite easy to get derivative and integral.

Great job !

 

[Benoit Daloze]

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You should maybe try with -w:

ruby -vw symbolic.rb

ruby 1.9.2dev (2009-12-11 trunk 26067) [x86_64-darwin10.2.0]

/symbolic/summand.rb:73: warning: private attribute?
/symbolic/factor.rb:71: warning: shadowing outer local variable - base
/symbolic/factor.rb:117: warning: private attribute?

The second is easy, but the others reveal strange use of attr_reader.

Why do you use attr_reader in private context? This is only usefull in a
public context I think, as instance variables can be directly accessed by
@var (even when it is a variable from the superclass)

It correctly pass all the tests, with one warning about drb(circular
require) and these 3. Putting the attr_reader before the "private" actually
remove the warnings.

That looks really cool, thanks!

I began something like that some time ago.

Remembering I had some awful:
module MathExp
class Function
def self.sq(x = nil) Function.newsq, x, '2x', 'x^3/3') end

I was using String for functions, as I didn't know yet the power of coerce.
But that was quite easy to get derivative and integral.

Great job !

 

[David Masover]

http://github.com/brainopia/symbolic - for people interested in symbolic
math in pure ruby, i would love contribution from community.

Looks like it would've been pretty useful for an idea I had awhile ago...

I ended up writing my own library. It's a mess, too, but if you find anything
useful, go for it:

http://github.com/masover/math

It's even got a gemspec all ready to go, though I haven't published a gem for
it.

 

[Robert Klemme]

http://github.com/brainopia/symbolic - for people interested in symbolic
math in pure ruby, i would love contribution from community.

Thanks! That looks good.

Kind regards

robert

 

[Intransition]

http://github.com/brainopia/symbolic- for people interested in symbolic
math in pure ruby, i would love contribution from community.

Cool beans. Your notation is very intuitive.

I wonder if the same can be done for symbolic logic.

 

[Allen Lee]

[Note: parts of this message were removed to make it a legal post.]

Wonderful!