我从Windows命令行（cmd.exe）启动以下内容：
C:\Users\lisa>"C:\Program Files\R\R-3.4.0\bin\Rscript.exe" -e rmarkdown::render('O:/ope/Auto/bin/IHYG.Rmd') "https://www.ishares.com/it/investitore-privato/it/site-entry-new?siteEntryAction=ACCEPT&targetUrl=%2Fit%2Finvestitore-privato%2Fit%2Fprodotti%2F251843%2Fishares-euro-high-yield-corporate-bond-ucits-etf%2F1488627371220.ajax%3FsiteEntryPassthrough%3Dtrue%26fileType%3Dcsv%26fileName%3DIHYG_holdings%26dataType%3Dfund%26locale%3Dit_IT%26userType%3Dindividual" "IBOXXMJA Index" "EUR003M Index" "O:/ope/Auto/data/IHYG.csv"
我也尝试了以下内容：
C:\Users\lisa>"C:\Program Files\R\R-3.4.0\bin\Rscript.exe" -e rmarkdown::render('O:/ope/Auto/bin/IHYG.Rmd') --args arg1="https://www.ishares.com/it/investitore-privato/it/site-entry-new?siteEntryAction=ACCEPT&targetUrl=%2Fit%2Finvestitore-privato%2Fit%2Fprodotti%2F251843%2Fishares-euro-high-yield-corporate-bond-ucits-etf%2F1488627371220.ajax%3FsiteEntryPassthrough%3Dtrue%26fileType%3Dcsv%26fileName%3DIHYG_holdings%26dataType%3Dfund%26locale%3Dit_IT%26userType%3Dindividual" arg2="IBOXXMJA Index" arg3="EUR003M Index" arg4="O:/ope/Auto/data/IHYG.csv"
因为我知道第一个参数非常长，所以让我拆分命令行，这样你就可以更好地看到每个参数：
arg1="https://www.ishares.com/it/investitore-privato/it/site-entry-new?siteEntryAction=ACCEPT&targetUrl=%2Fit%2Finvestitore-privato%2Fit%2Fprodotti%2F251843%2Fishares-euro-high-yield-corporate-bond-ucits-etf%2F1488627371220.ajax%3FsiteEntryPassthrough%3Dtrue%26fileType%3Dcsv%26fileName%3DIHYG_holdings%26dataType%3Dfund%26locale%3Dit_IT%26userType%3Dindividual"
arg2="IBOXXMJA Index"
arg3="EUR003M Index"
arg4="O:/ope/Auto/data/IHYG.csv"
在我的R Markdown代码块中，我将一些sink和write设置为日志文件以跟踪发生的情况：我编写属于args数组的元素来自args = commandArgs(trailingOnly = TRUE)。
这是我得到的：
args[1]=https://www.ishares.com/it/investitore-privato/it/site-entry-new?siteEntryAction=ACCEPT
args[2]=NA
args[3]=NA
args[4]=NA
超链接被截断，我不明白为什么，而其他参数完全缺失。
有什么想法吗？