我想在我的RStudio中安装devtools。但我得到吨的错误: * installing *source* package ‘curl’ ...
** package ‘curl’ successfully unpacked and MD5 sums checked
Package libcurl was not found in the pkg-config search path.
我已经安装了下面的类在我的定制[R包警告: #' A stock.returns class is an xts of stock(s) returns, a timeframe and the currency used.
#'
#' @slot xts_returns An xts of stock returns (potentially multiple stocks)
#' @sl