Re: Re: ncl-talk Digest, Vol 10, Issue 11

From: Dennis Shea (shea AT ucar.edu)
Date: Tue Apr 19 2005 - 20:22:33 MDT

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    http://www.ncl.ucar.edu/Document/Functions/Built-in/equiv_sample_size.shtml

    should do this.

    good luck

    On Wed, 20 Apr 2005, alexg wrote:

    > Hi,
    > I'm trying to calculate a (95%) confidence level on a
    > correlation/regression map (ie correlating a single timeseries with the
    > timeseries for another variable, over a number of spatial points).
    > To do this for two timeseries I would use information about the
    > autocorrelations in order to work out an effective number of degrees of
    > freedom. Hoverver for a correlation map this is quite a computationally
    > intensive process - looping over each grid point and at multiple lags.
    > Are there any in built functions that do this?
    > Many thanks
    > Alex
    >
    > _________________________________________________________________
    > Alex Sen Gupta
    > Centre for Environmental Modelling and Prediction (CEMAP)
    > School of Mathematics
    > The University of New South Wales Telephone: +61-2-9385-6902
    > UNSW SYDNEY NSW 2052 Facsimile: +61-2-9385-7123
    > Australia E-mail: alexg@maths.unsw.edu.au
    > www.maths.unsw.edu.au/~alexg/
    > _________________________________________________________________
    >
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