Question
This is a third-order trend-surface model. How could I interpreted this trend-surface regression model, like the relationship between elevation and distance and x,y coordinate? I
This is a third-order trend-surface model.
How could I interpreted this trend-surface regression model, like the relationship between elevation and distance and x,y coordinate?
I generate formula for polygonial trend-surface model by select sample points in my study area, and the distance to rive is covariable. So, this is a third order trend-surface regression model. How can I interpret this third order trend-surface regression model.
ELEVATION ~ DIST + I(X^1 * Y^0) + I(X^0 * Y^1) + I(X^2 * Y^0) + I(X^1 * Y^1) + I(X^0 * Y^2) + I(X^3 * Y^0) + I(X^2 * Y^1) + I(X^1 * Y^2) + I(X^0 * Y^3)
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