A friend read a statement in an article but she was wondering if it was correct.
Statement:
To calculate a "normal" correlation between two variables, the variables shouldn't be spatially dependent. Meaning variables z1 and z2 don't exhibit any spatial dependence and the variables could be considered random distributed across a sample grid x,y. Only under these conditions the normal correlation coeff. and statistics could be used.
Any input on this?
And what if there is spatial dependence?
I hope it makes a little sense, I didn't have access to the article itself so I had to do it with a simple explanation of my friend.
Best regards,
Koen.
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