原创 mahout 讀書
People tend to like things that are similar to other things they like. Mahout contains a recommender engine – several
2020-02-25 02:54:50
原创 hive 錯誤記錄
[hadoop@master ~]$ hive -e "load data inpath '/fenxi_system/cs/20130131/sm
2020-02-25 02:54:50
原创 ETL
ETL(Extract-Transform-Load的縮寫，即數據抽取、轉換、裝載的過程)作爲BI/DW（Business Intelligence）的核心和靈魂，能夠按照統一的規則集成並提高數據的價值，是負責完成數據從數據源向目標數據
2018-08-22 04:36:50
1
原创 cron
http://www.liusuping.com/ubuntu-linux/Redhat-linux-at-cron.html http://article.pchome.net/content-522566.html
2018-08-22 04:36:50
2
原创 yelp投票預測
> randomForest( review_votes.useful ~ ., data=rFdata, importance=TRUE, na.action=na.omit,proximity=TRUE,keep.forest=
2018-08-22 04:36:50
2
原创 殘差residual VS 誤差 error
In statistics and optimization, statistical errors and residuals are two closely related and easily confused measures
2018-08-22 04:36:50
原创 R語言convesio of json files to csv or R data format
library(RJSONIO) url <- "path/yelp_academic_dataset_business.json"con = file(url, "r")input <- readLines(con, -1L)my_r
2018-08-22 04:36:49
2
原创 ubuntu輸入法切換
lrwxrwxrwx 1 root root 30 Feb 4 10:45 zh_CN -> /etc/alternatives/xinput-zh_CN lrwxrwxrwx 1 root root 30 Feb 4 10:
2018-08-22 04:36:49
原创 merge
函數功能2： merge：可以將兩個dataFrame連接在一起，和數據庫中sql語句JOIN很相似。Dataframe a(with columns x, y, z) and b (with columns x1, x
2018-08-22 04:36:49
3
原创 R函數
do.call('rbind', lapply(1:10, function(i) unlist(my_results[i]))) reviews_user <- merge(df_reviews, df_user, by='user_
2018-08-22 04:36:49
1
原创 decision tree
recent surveys claim that it’s the most commonly used technique. One of the best things about decision trees is that hu
2018-08-22 04:36:49
1
原创 知識細節
非參數統計 數理統計學的一個分支。如果在一個統計問題中，其總體分佈不能用有限個實參數來刻畫，只能對它作一些諸如分佈連續、有密度、具有某階矩等一般性的假定，則稱之爲非參數統計問題。 optimization algorithm: Th
2018-08-22 04:36:49