How to use least square fit to 2D matrix data
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I have a set of OLR data in longitude x time, giving a size of 180 x 31, being xaxis the longitude and y-axis lag time in days. How would you measure the phase propagation of the minimum values (in contour), starting at the minimum on day 0?
I know it has to do with a least square fit, but I dont know how to do it
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