Hi !
I'am sure this is an easy question for most of you…
I have a timeseries 'T' and I wanted to convert this into a vector 'V' of rolling Standard deviations. So every element of 'V' is the Std of the previous 30 elements of 'T'. The first thirty elements of 'V' are NaN then, right?
Could someone pleas help me with this problem?
Thanks, Nico
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