最近伦敦Barbican博物馆举办了一个叫“雨室”的展览：一个房间，水从天花板各处洒下来，但进入里面的游客不会被淋湿，因为天花板上面会有传感器检测到人所站的位置，关掉他们正头顶的龙头。这是项有趣而聪明的交互艺术，所以很受欢迎。这个展览开放的那会儿，我在Twitter上时常见到人们站在雨室中的照片，标题通常是“雨室@Barbican!”，当然，还有能证明他们确实到过那的位置信息。
Okay, the title of this post is getting longer and sillier, but this is the 3rd continuation of my last two post on comparing different libraries for everyday matrix operations. The last two posts compared basic operations such as multiplication, transposition, inversion etc. etc. in isolation, which is probably not a good reflection of real life usage. So I decided to come up with a new test that would combine different matrix operations together. I chose the pseudoinverse because it is something I use every now and then and it combines multiplication, transposition and inversion, which seems like a good test.
过年这几天休息在家看电影，重温了一遍《致命魔术》，剧情就不赘述了，但是两位主角在魔术Transported Man（瞬间移动）上各自的表演秘密让我颇有感悟。
Borden的Transported Man秘密很简单，就是用的替身，只是这个替身是他的孪生兄弟，为了追求以假乱真时常互换身份生活，为了追求外表一致自残身体，甚至最后为了保守秘密害自己的妻子自杀。