I have a graph of residuals and I am attempting to get a list of the indexes of each time the residual is greater than 2 standard deviations or less than -2 standard deviations, but only the first point of the section. And then I'd also need the first point where the point returns to the range between +/- 2 standard deviations. So basically if my standard deviation=1 and my residuals=c(1, 2.1, 3, 4, 3, 1, 0, -4, -1) I want it to grab the second number, where it exceeds 2 standard deviations and the 6th where it returns to less than 2 standard deviations. Also, it would grab -4 (or residuals[ 8]) and -1 (residuals[9])
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