如何格式化导入的 csv 文件答案

【问题标题】：How to format an imported csv file如何格式化导入的 csv 文件
【发布时间】：2021-05-16 02:39:30
【问题描述】：

我正在尝试从 .csv 文件导入数据集，但我的文件记录了 ? 符号。我怎样才能避免'？'。 market data 网站。

样本数据：

structure(list(`N2EX Day Ahead Auction Prices in EUR/MWh` = c("UK time", 
"23<ff>-<ff>00", "00<ff>-<ff>01", "01<ff>-<ff>02", "02<ff>-<ff>03", 
"03<ff>-<ff>04"), X2 = c("CET/CEST time", "00<ff>-<ff>01", "01<ff>-<ff>02", 
"02<ff>-<ff>03", "03<ff>-<ff>04", "04<ff>-<ff>05"), X3 = c("06/01/2019", 
"62,56", "69,54", "62,51", "59,17", "58,81"), X4 = c("05/01/2019", 
"73,38", "65,25", "63,45", "58,86", "57,84"), X5 = c("04/01/2019", 
"63,56", "65,48", "65,77", "56,51", "56,42"), X6 = c("03/01/2019", 
"61,05", "61,04", "61,06", "60,97", "56,70"), X7 = c("02/01/2019", 
"54,37", "57,65", "58,19", "55,39", "53,84"), X8 = c("01/01/2019", 
"66,85", "66,99", "62,13", "51,51", "49,14"), X9 = c("31/12/2018", 
"57,97", "63,27", "62,07", "56,68", "54,50"), X10 = c("30/12/2018", 
"65,16", "67,38", "72,37", "60,97", "58,83")), row.names = c(NA, 
-6L), class = c("tbl_df", "tbl", "data.frame"))

【问题讨论】：

你想避免?是什么意思，是不是当你阅读csv文件时，一些字符被转换为?如果是这样我认为我们需要csv文件以了解问题
@MohanGovindasamy 谢谢我使用来自nordpoolgroup.com/Market-data1/GB/Auction-prices/UK/Hourly/…的数据

标签： r dataframe csv

【解决方案1】：

我将您的示例数据读取为“数据”，并将生成 ? 的内容替换为如下：

data$`N2EX Day Ahead Auction Prices in EUR/MWh` <- gsub("<ff>","",data$`N2EX Day Ahead Auction Prices in EUR/MWh`)
data$X2 <- gsub("<ff>","",data$X2)

【讨论】：