You can get a running mean with a convolution filter. For example, if you
want a five point average use (0.2 0.2 0.2 0.2 0.2). The only catch is
that you need an odd number of points and something that rounds off nicely.
I can't help with the rest of it, but I suspect that the node counting may
be a feature included in the geochem package. It appears to have better
statistical support than the geophysics.
-Jeff
At 06:22 PM 4/25/01 , you wrote:
>Hi
>I was wondering if anyone has any comments or hints for a couple
>things I'm trying to do.
>
>1) Calculate a 'running' mean, mode, and min of a channel over a given
>interval - say 80 to 100 data points. Storing the results in a new channel
>at the mid-point ie at the 40th point in the case of 80 points. This can be
>done in a spreadsheet but I was hope to avoid have to export and
>reimport the data.
>
>2) Count the number of data points that would fall within given
>sub-areas or windows. The sub-areas are usually squares if it
>matters/helps. I could go through windowing the data, but has anybody
>tried to automate this other than with a script and a series of mask files.
>
>Thanks
>Darren
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* Jeff Gamey (4tj)
* Environmental Sciences Division [EMAIL PROTECTED]
* Oak Ridge National Laboratory (865) 574-6316 tel
* POBox 2008, Bldg 1505, MS6038 (865) 576-8646 fax
* Bethel Valley Rd., Oak Ridge, TN (865) 599-0820 cell
* 37831-6038
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