R:如何在 for 循环中重命名数据框? [英] R: how to rename a dataframe within a for loop?

问题描述

我必须分别为多个国家/地区运行 API 下载功能.我的变量是我从 Excel 列表中读入的字符串.每个观察值都由三个字母的国家标识符(codes[i,1])标识.理想情况下，我想这样做:

I have to run an API download function for several countries separately. My variables are strings that I read in from an Excel-list. Each observation is identified by a three letter country identifier(codes[i,1]). Ideally, I would want to do this:

codes = read.xls("data.xlsx")

for(i in 1:50) {
codes[i,1] = Quandl(c(toString(codes[i,2]),toString(codes[i,3]),toString(codes[i,4])), collapse="annual")
}

显然，codes[i,1] = ... 不起作用.这个问题有没有简单的解决方案.性能不是主要问题.感谢您的帮助.

obviously, codes[i,1] = ... doesn't work. Is there a simple solution to this problem. Performance isn't a major concern. Thanks for your help.

推荐答案

codes = read.xls("data.xlsx")

for(i in 1:50) {
assign(codes[i,1], Quandl(c(toString(codes[i,2]),toString(codes[i,3]),toString(codes[i,4])), collapse="annual"))
}

试试看.

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