我有一个数据表与同一列中的.txt链接列表。我正在寻找一种方法让R在每个链接中搜索文件是否包含折扣率或折扣现金流。然后,我要R在每个链接旁边创建2列(一个用于折扣率,另一个用于折扣现金流),如果存在,那么其中将有1个,如果不存在则为0。如何在一列链接中查找r中的字符串匹配?
这里的示例链接的小单子,我想通过筛选:
http://www.sec.gov/Archives/edgar/data/1015328/0000913849-04-000510.txt
http://www.sec.gov/Archives/edgar/data/1460306/0001460306-09-000001.txt
http://www.sec.gov/Archives/edgar/data/1063761/0001047469-04-028294.txt
http://www.sec.gov/Archives/edgar/data/1230588/0001178913-09-000260.txt
http://www.sec.gov/Archives/edgar/data/1288246/0001193125-04-155851.txt
http://www.sec.gov/Archives/edgar/data/1436866/0001172661-09-000349.txt
http://www.sec.gov/Archives/edgar/data/1089044/0001047469-04-026535.txt
http://www.sec.gov/Archives/edgar/data/1274057/0001047469-04-023386.txt
http://www.sec.gov/Archives/edgar/data/1300379/0001047469-04-026642.txt
http://www.sec.gov/Archives/edgar/data/1402440/0001225208-09-007496.txt
http://www.sec.gov/Archives/edgar/data/35527/0001193125-04-161618.txt
'dput()'> imgs – hrbrmstr