Dear R-users,
How do I extract numbers between asp?P= and &VID from my txt vector? I have
tried grep function with no luck.
txt <- c("
http://www.mysite.com/system/empty.asp?P=2&VID=default&SID=421384237289476&S=1&C=18631";,
"
http://www.mysite.com/system/empty.asp?P=123&VID=default&SID=421384237289476&S=1&C=18643";,
"
http://www.mysite.com/system/empty.asp?P=342&VID=default&SID=421384237289476&S=1&C=18634
","
http://www.mysite.com/system/empty.asp?P=232&VID=default&SID=421384237289476&S=1&C=18645";,
"
http://www.mysite.com/system/empty.asp?P=2345&VID=default&SID=421384237289476&S=1&C=18254";,
"
http://www.mysite.com/system/empty.asp?P=257654&VID=default&SID=421384237289476&S=1&C=18732";,
"
http://www.mysite.com/system/empty.asp?P=22&VID=default&SID=421384237289476&S=1&C=18637";,
"
http://www.mysite.com/system/empty.asp?P=2463&VID=default&SID=421384237289476&S=1&C=18575
")
The result should be like
2
123
342
232
2345
257654
22
2463
Thanks,
Lauri
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