将文件从PostgreSQL导入R

Question

我有一个大型数据集,我将在R软件中进行一些分析.虽然我无法将数据正确导入R.

我收到此错误:

Error in postgresqlNewConnection(drv, ...) : RS-DBI driver: (could not connect User@local on dbname "Intel"

我使用PostgreSQL打开数据并以某种方式管理它.如何将PostgreSQL中的现有数据导入R软件？

Answer 1

drv <- dbDriver("PostgreSQL")
con <- dbConnect(drv, host='localhost', port='5432', dbname='Swiss',
                 user='postgres', password='123456')

此外,应安装R中的"RPostgreSQL"包.

Answer 2

试试R包RPostgreSQL http://cran.r-project.org/web/packages/RPostgreSQL/.您可以在http://code.google.com/p/rpostgresql/中查看如何使用它.例:

library(RPostgreSQL)
drv <- dbDriver("PostgreSQL")   ## loads the PostgreSQL driver
con <- dbConnect(drv, dbname="R_Project")   ## Open a connection 
rs <- dbSendQuery(con, "select * from R_Users")   ## Submits a statement
fetch(rs,n=-1)   ## fetch all elements from the result set
dbGetQuery(con, "select * from R_packages")   ## Submit and execute the query
dbDisconnect(con)   ## Closes the connection
dbUnloadDriver(drv)   # Frees all the resources on the driver