Hello everyone, I am currently working with some data where I need to select the first occurrence of a value after the occurrence of another value.
The data has two columns, one with a time and one with occurence of certain events. The column of data I want to select from looks like this (and each of these events have a corresponding time in another column). Stat71 OutMag FirstResp InMag MagUp OutMag MagDwn Resp Resp Resp InMag MagUp OutMag InMag OutMag InMag OutMag InMag OutMag InMag MagDwn OutMag Resp MagUp InMag MagDwn OutMag Resp MagUp Using "which" I have selected all the individual occurrences of each event and created variables with the time of said events within them which I used to calculate differences in time etc for analysis. But now I am faced with the issue that I need to select only the first "Resp" that occurs after a "MagDwn" so that I can calculate the differences in time between these two events. Any help would be appreciated, usually I just read these forums and try and figure out problems for myself but this is for my masters and I'm running out of time to get it finished :) Thanks Surrey -- View this message in context: http://r.789695.n4.nabble.com/Selecting-the-first-occurrence-of-a-value-after-an-occurrence-of-a-different-value-tp3217340p3217340.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
