4 ms·
Why does it use two sets of vectors? One sum of vectors is enough to trace any continuous line.
by loa_in_ 6y ago
Why does it use two sets of vectors?
One sum of vectors is enough to trace any continuous line.
- falseprofit 6y agoYeah, this is pretty annoying. Starting with a function from the circle to the complex plane, the Fourier series decomposes it into a sum of exponentials, which are circular motions about 0. This version with x and y coordinates separated overcomplicates and confuses. And with a four-dimensional output, there are 2 unused dimensions whose values are arbitrary.
- physicles 6y agoI wonder if this means the problem is under-determined (too many degrees of freedom) and that leads to numerical instability. Certainly one set of equations is enough, as 3Blue1Brown’s Fourier transform video shows.
- hinkley 6y agoPerhaps so the animations are outside of the drawing area?
- golem14 6y agoAnd I would guess you get fewer artifacts - the version linked in a sibling comment with just one end has a lot of factors and yet is not very accurate.
- lordnacho 6y agoHere's a hypnotic version with one sum: https://youtu.be/-qgreAUpPwM https://youtu.be/-qgreAUpPwM
- hardmath123 6y agoI implemented such a version in Scratch back in 2016! https://scratch.mit.edu/projects/117304786/ https://scratch.mit.edu/projects/117304786/ Here’s a gif of that if the project player doesn’t work for you: https://github.com/kach/gifblocks/blob/master/gallery/fourier.gif https://github.com/kach/gifblocks/blob/master/gallery/fourie...