Math 21a Fall 2019
Multivariable Calculus

Rise and Fall of Websites
Data visualization is an art. Here is an example done on this youtube page. It visualizes a curve r(t) of data in a high dimensional case. The vector is always ordered according to the rank. Where do the data come from? According to the video page, data are there attributed to media benchmark and companies reports. According to Lifewire, the most popular sites are currently 1. Google.com, 2. youtube, 3. Baidu, 4. Tmall, 5. QQ, 6. Sohu 7. Facebook, 8. Taobao, 9. Wikipedia, 10. Yahoo. Here is a version of this Data is beautiful video compressed in 1 minute:Direct Media Links: Webm, Ogg Ipod
Direct Media Links: Webm, Ogg Ipod