Correlation between a nominal and a continious rasters

?

Hi all

I need to find how much two *raster* variables are correlated. One of these
variables is categorical (*nominal* such as land-cover) and the other one
is *continuous*.

I also need to do the same analysis for a *Binary raster layer* (0,1)
and a *continuous
raster layer*.  Could you please give me some bits of advice about the best
methods in this regard in R?

Excuse me if you find my question so elementary because I?m new in R.



Best regards

Iman