Say I have a timeseriesforecast on a series of data, result in
$10, 30, 50, 100, 400, 700, \ldots$
I want the programme to output the serial number (position in the forecast-series) of the first element larger than 500.
(in the above case, the answer should be 6)
How can I do it?
FirstPosition[yourlist, _?(# > 500 &)]? – MarcoB Feb 17 '16 at 04:42