3 ms·
Hurmph. I don't see how it makes much difference whether he uses sine or cosine, since he's also adding t to the operand and then animating over it, causing the
by fenomas 12y ago
Hurmph. I don't see how it makes much difference whether he uses sine or cosine, since he's also adding t to the operand and then animating over it, causing the waveform to move along the x-axis. He can use one and start from t=0 or use the other and start from t=pi/2, as you like.
My point was simply that the "spike" the article goes on about (which I earlier called a discontinuity, oops) shows up because the author is reflecting his plot around the Y axis. The article makes it sound like the spike was some physically significant feature of the function being graphed.
- JadeNB 12y agoI agree that it doesn't make any difference when you allow phase shifts (I was intentionally focussing on the `t = 0` case), so I'm puzzled by your suggestion that the author should have used cosine instead. My point was more that there's nothing inherently 'spiky' about even functions; as your own example of cosine shows, they can be just as smooth (or spiky) as any other function.
- fenomas 12y agoI think you're conflating people, if that was in reply to my immediately previous post.
- JadeNB 12y agoYes, you're right—I thought that you had made the post that was actually made by T-hawk (https://news.ycombinator.com/item?id=9022743 https://news.ycombinator.com/item?id=9022743 )—but I think that it doesn't change my point.