Comments on: Drawing the Mandelbrot set in Ruby and Haskell

By: Ochronus

Ochronus — Thu, 17 Feb 2011 08:39:53 +0000

Check the relevant thread on reddit please.

By: ochronus

ochronus — Wed, 07 Jul 2010 19:45:00 +0000

@Roger Braun, thanks, it’s a very nice tip!

By: Roger Braun

Roger Braun — Wed, 07 Jul 2010 19:42:59 +0000

Some small changes that make it colored:

COLORS = 0xfffff / ITERATIONS

def escapes?(c)
z = 0
ITERATIONS.times do |x|
return x if z.abs > 2
z = z*z + c
end
false
end

And change the central part to:

escape = escapes?(Complex(x,y))
Draw.new.fill(“#%06x” % (escape * COLORS)).point(x_pixel,y_pixel).draw(complex_plane) if escape

By: ochronus

ochronus — Tue, 22 Jun 2010 10:52:51 +0000

@Joey Primiani, thanks for the kind words

By: Joey Primiani

Joey Primiani — Tue, 22 Jun 2010 10:50:36 +0000

Excellent site you have here, beautiful stuff. BTW – Thanks for the comment on my site.

By: germanlinux

germanlinux — Fri, 05 Mar 2010 13:49:07 +0000

Drawing the Mandelbrot set in Ruby and Haskell http://bit.ly/d0oWF4 via @AddToAny

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By: rlaksana

rlaksana — Thu, 04 Mar 2010 20:46:59 +0000

Drawing the Mandelbrot set in Ruby and Haskell – http://su.pr/26BuuN

This comment was originally posted on Twitter

By: ochronus

ochronus — Thu, 04 Mar 2010 05:20:18 +0000

@Patrick, Thanks, nice catch! Corrected.

By: ochronus

ochronus — Thu, 04 Mar 2010 05:18:11 +0000

No, the point is that after step #1, a holds the current aggregated value

This comment was originally posted on Reddit

By: Patrick

Patrick — Thu, 04 Mar 2010 03:15:46 +0000

You have a mistake on the inner while loop. You increment y_pixel when you should increment x_pixel

By: prezjordan

prezjordan — Thu, 04 Mar 2010 01:09:20 +0000

Not really I’m still rather confused. Maybe you could just use 1 variable instead of a,b ?

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By: ochronus

ochronus — Wed, 03 Mar 2010 14:52:23 +0000

also for a better reference, read this: http://en.wikipedia.org/wiki/Fold_(higher-order_function)

This comment was originally posted on Reddit

By: ochronus

ochronus — Wed, 03 Mar 2010 14:49:27 +0000

It’s like ‘collapsing’ the array, squashing it into one value. A simpler example: irb(main):006:0> [1,2,3,4].inject {|a,b| puts "#{a};#{b}" ; a+b} 1;2 3;3 6;4 => 10 I hope it’s clearer now

This comment was originally posted on Reddit

By: prezjordan

prezjordan — Wed, 03 Mar 2010 14:35:55 +0000

Beautiful I wish I understood the "inject" syntax… but unfortunately, I do not. I’m pretty new to Ruby.

This comment was originally posted on Reddit

By: jasonreich

jasonreich — Wed, 03 Mar 2010 09:50:50 +0000

Drawing the Mandelbrot set in Ruby and Haskell http://bit.ly/bCVUy2 #haskell #mandelbrot #math #ruby #cs

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By: ochronus

ochronus — Wed, 03 Mar 2010 06:23:51 +0000

@Diego, thanks, it was a blooper, of course I meant nth item It’s corrected now

By: jc00ke

jc00ke — Wed, 03 Mar 2010 06:23:38 +0000

Drawing the Mandelbrot set in Ruby and Haskell http://icio.us/slue1d

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By: Diego

Diego — Wed, 03 Mar 2010 05:25:09 +0000

>> list !! n: take the first n items from the list

No it doesn’t. It takes the n-item from the list. To take the first n items you should use take.

[1..3] !! 2 -> 3
take 2 [1..3] -> [1,2]

By: ochronus

ochronus — Tue, 02 Mar 2010 17:54:13 +0000

Generating the Mandelbrot set in #Ruby and #Haskell http://is.gd/9xE9w

This comment was originally posted on Twitter