05 2016 档案
摘要:dplyr and data.table are amazing packages that make data manipulation in R fun. Both packages have their strengths. While dplyr is more elegant and re
阅读全文
摘要:We use network visualizations to look into the voting patterns in the current German parliament. I downloaded the data here and all figures can be rep
阅读全文
摘要:In this note, we discuss principal components regression and some of the issues with it: The need for scaling. The need for pruning. The lack of “y-aw
阅读全文
摘要:FCM 0.001 && (iter 1) { minJ = 0 i = 2 while (i lim && step 0) n.misclass = length(i.misclass) f.misclass = n.misclass/length(dat$class) } # 同一数据,使用 kmeans 聚类 kmea...
阅读全文
摘要:INTRODUCTION GPUs (Graphic Processing Units) have become much more popular in recent years for computationally intensive calculations. Despite these g
阅读全文