How to calculate correlation coefficient between two 3-d matrices?

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Sagar
Sagar 2014-5-23
评论： Sagar 2017-10-10
This is often required in analyzing climate data from netcdf files. Climate variables are stored in 3-d matrix (lat, lon, time). I want to find correlation coefficient between two 3-d matrices at each grid cell (i.e. correlation along time or 3rd dimension). Is there an easier way to do this, without reshaping, for geometric intuition of the grid map? Also how to get the p-value at each grid cell after calculating the correlation?

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回答（2 个）

Adapa Bhagyaraja
Adapa Bhagyaraja 2015-8-10
Hello Sagar, There is a question similar to this. Check answer at http://in.mathworks.com/matlabcentral/answers/15884-correlation-for-multi-dimensional-arrays
André Gadêlha
André Gadêlha 2017-10-10
Hi, Sagar.
Did you understand? I have got the same problem with netcdf analysis. How can I do it?
Best Regards,
  1 个评论
Sagar
Sagar 2017-10-10
There is no way to do it directly. You must reshape the matrix and convert to vectors. After that you can calculate correlations in a loop.

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