Hi there, I am working on a project that requires me to find the point at which values become negative in a sequence about the max.
For example, say I have some sequence: x=c(-12, -2,-19, 0, -14, -2, 9,10,20,35,56,89,60,39,12,8,-5,-2,0,10) In this sequence, the max is 89, and I need to identify that -2 and -5 are the points at which the values* first *become negative about the max and retrieve their index values. I was hoping for some help in finding a way to automate this procedure, as I have over 100 vectors of this kind where I must find the two values about the max. Could anyone help? I would really, really appreciate it! Thank you so much! Best, Su [[alternative HTML version deleted]] ______________________________________________ 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.