Vlookup-match like function in R
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I am very new to R, and I am currently to apply however little knowledge of R I have to an analytical work I have to perform for work. I have two dataframes - dataframe A consists of transactions details, while dataframe B consists of the monthly closing exchange rate for various currencies. Data frame A - transaction details TRANSACTION_ID COLLECTION_CRNCY COLLECTION_AMT MMYYYY LODG_DATE 1 0001 INR 305000 Mar 2014 2014-03-01 2 0002 USD 15000 Oct 2014 2014-10-31 3 0003 JPY 85000 Feb 2015 2015-02-09 4 0004 CNY 1800000 Mar 2015 2015-03-27