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How to use least square fit to 2D matrix data

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Luis Jesús Olvera Lazcano
评论： Luis Jesús Olvera Lazcano 2023-9-7
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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Matt J
Matt J 2023-9-7
[~,location]=min(Data);
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Matt J
Matt J 2023-9-7
If you mean you want to do a line fit to the minima locations, then,
[~,location]=min(Data);
p=polyfit(0:30,location,1);
slope=p(1);
Luis Jesús Olvera Lazcano
Luis Jesús Olvera Lazcano 2023-9-7
Ohhh, but how do i put it in the same pcolor graph?
Im sorry Im a little lost with this, but thanks youre helping me a lot

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