Question

运行代码并尝试将数据集导出到电子表格或txt.file后，我遇到了困难。我是R的新手，所以也许这个问题很简单。

运行以下代码后：

eia_series <- function(api_key, series_id, start = NULL, end = NULL, num = NULL, tidy_data = "no", only_data = FALSE){
  # max 100 series
  # test if num is not null and either start or end is nut null. Not allowed
  # api_key test for character.
  # series_id test for character.
  # if start/end not null, then check if format matches series id date format
  # parse date and numerical data

  # parse url
  series_url <- httr::parse_url("http://api.eia.gov/series/")
  series_url$query$series_id <- paste(series_id, collapse = ";")
  series_url$query$api_key <- api_key
  series_url$query$start <- start
  series_url$query$end <- end
  series_url$query$num <- num

  # get data
  series_data <- httr::GET(url = series_url)
  series_data <- httr::content(series_data, as = "text")
  series_data <- jsonlite::fromJSON(series_data)

  # Move data from data.frame with nested list and NULL excisting
  series_data$data <- series_data$series$data
  series_data$series$data <- NULL

  # parse data
  series_data$data <- lapply(X = series_data$data, 
                         FUN = function(x) data.frame(date = x[, 1], 
                                                      value = as.numeric(x[, 2]), 
                                                      stringsAsFactors = FALSE))

  # add names to the list with data
  names(series_data$data) <- series_data$data

  # parse dates
  series_data$data <- eia_date_parse(series_list = series_data$data, format_character = series_data$series$f)

  # tidy up data
  if(tidy_data == "tidy_long"){

    series_data$data <- lapply(seq_along(series_data$data), 
                           function(x) {cbind(series_data$data[[x]], 
                                              series_time_frame = series_data$series$f[x],
                                              series_name = series_data$series$series_id[x], 
                                              stringsAsFactors = FALSE)})
series_data$data <- do.call(rbind, series_data$data)
  } 

  # only data
  if(only_data){
    series_data <- series_data$data
  }

  return(series_data)
}

运行功能后

eia_series(api_key = "XXX",series_id = c("PET.MCRFPOK1.M", "PET.MCRFPOK2.M"))

我试图＆＃34;转移＆＃34;数据以便导出但出现以下错误：

未提供编码：默认为UTF-8。

我不明白为什么。你能救我一下吗？

Answer 1

这看起来不像是错误，而是一种陈述。可能来自httr::content(series_data, as = "text")。查看正文部分的https://cran.r-project.org/web/packages/httr/vignettes/quickstart.html。只要您的数据返回您期望的内容，这应该不是问题。否则你可以尝试不同的编码或其他地方有一个错误。

Answer 2

尝试：

series_data <- httr::content(series_data, as = "text", encoding = "UTF-8")

如何修复“No encoding Supplied”错误？

2 个答案: