Finding start of growing season
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I have a time series with values of average daily temperatures for a period from 1 January 1943 - 31 December 2017. The data are in a matrix (a) with the first column being the date, as number (for example in my case a(100,1) = 7.0977e+05 being 10-Apr-1943 12:00:00). For all the years I need to find the date after 7 consecutive days have had a temperature > 5 oC. This is normally to occur somewhere between the 1 April - 31 May and is considered the start of the growing season
Wonder how to obtain these dates for the period from 1.1.1943 - 31.12.2017. Hope there is one who can give me an idea, suggestion.
Thanks in advance