This is truly outstanding. I'd love to see an entire series done like this.
Maybe you could Kickstarter this, and use it as a template for a series of DSP/Electronics/Physics titles?
Show HN: Interactive Essay on Signals, Sampling and the Fourier Transform
31–40 of 45 posts
Re: Show HN: Interactive Essay on Signals, Sampling and the Fourier Transform
#32This is so, so cool. I wish this is what all textbooks were like.
Re: Show HN: Interactive Essay on Signals, Sampling and the Fourier Transform
#33This is truly outstanding. I'd love to see an entire series done like this. Maybe you could Kickstarter this, and use it as a template for a series of DSP/Electronics/Physics titles?
Absolutely! I would gladly contribute to a Kickstarter fund to pay for your efforts. I am sure I am not the only one...
Re: Show HN: Interactive Essay on Signals, Sampling and the Fourier Transform
#34Hi Jack, awesome work! Did you write the HTML by hand or did you use or write some static generator? I'd love to have sidenotes like yours automatically generated and positioned.
Re: Show HN: Interactive Essay on Signals, Sampling and the Fourier Transform
#35This is the future of textbooks.
Re: Show HN: Interactive Essay on Signals, Sampling and the Fourier Transform
#36Earlier quoted context omitted.
Take a look at geometric algebra. http://www.geometricalgebra.net/ http://en.m.wikipedia.org/wiki/Geometric_algebra
That's not quite the same, but worth reading up on anyway.
The quaternions are a subalgebra of geometric algebra. It's not quite the same in that it's strictly more general and, therefore, more broadly applicable.
Re: Show HN: Interactive Essay on Signals, Sampling and the Fourier Transform
#37This is simply beautiful
Re: Show HN: Interactive Essay on Signals, Sampling and the Fourier Transform
#38Hi Jack, awesome work! Did you write the HTML by hand or did you use or write some static generator? I'd love to have sidenotes like yours automatically generated and positioned.
I can't speak to how he did it, but it looks like he's just using tables and line breaks & divs to separate sections. You could easily do that by hand.
Alternately, you could use Bret Victor's technique from "Magic Ink": write a paragraph followed by a span, typically with absolute positioning. http://worrydream.com/#!/MagicInk
Re: Show HN: Interactive Essay on Signals, Sampling and the Fourier Transform
#39This is an _incredibly_ well-crafted piece of work. I mean -- my god -- the pressure wave animation? [1] 1: http://jackschaedler.github.io/circles-sines-signals/sound.h...
As a side note, the pressure that is waxing and waning in that diagram is very very small compared to atmospheric pressure.
The actual air molecules are moving at a much higher speed (the root mean squared velocity is dependent on the temperature). But if we imagine that these are weightless dust particles suspended in air, the diagram is accurate.
Re: Show HN: Interactive Essay on Signals, Sampling and the Fourier Transform
#40This is incredible. I wish more professors in universities incorporated this stuff in their teaching. I occasionally use Wolfram Demonstrations: http://demonstrations.wolfram.com/
But you take it to another level! Congratulations!