Ching-Chuan Chen's Blogger

這是我自己在PTT PO的文，詳細介紹dplyr，以下是正文~~

這篇重點放在dplyr

這是我自己在PTT PO的文，詳細介紹data.table，以下是正文~~

data.table包含的東西很多

但是很多東西都可以被plyr, dplyr的function取代

所以data.table很多function，我都不太熟

這裡簡單介紹一下data.table

這是我自己在PTT PO的文，詳細介紹magrittr，以下是正文~~

鑒於andrew大大的提議，現下剛好有閒就來寫一系列資料整理套件的文章

版上比我熟這些套件的人也不少，如果不足的部分，再麻煩幫忙補充

To setup LatexTools in sublime text.

Here is a demonstration for ising model with an interative interface created by R package shiny.

I have showed several implementations for summing a list of matrices in the previous post. I introduce a function to be applied in do.call and test performance.

The matrix-vector arithmetic operation in R is difficult to do before. We need for-loop or replicate to compute. Now, we have sweep to do. There are several examples to demonstrate.

I had been searching how to use Rcpp function in snowfall or doSNOW for a long time, but there is still not a solution. I recently come up an idea to implement. Since the error is printed when exporting the Rcpp function to nodes, I compile Rcpp function in nodes. Surprisingly, I success.

A simple log for doing a job of mapreduce in python.

We implement wordcount by using hadoop streaming. New two python script files named mapper.py and reducer.py, respectively.

A simple log for installation of spyder2 and spyder3.