[R] adding a bravais pearson test to spplot

[fathalli bilel]

Dear all,
My name is Bilel and I'am a PhD student from Tunisia working on climate modelling. My issue today is how to add a Bravais Pearson test as a contour plot to an existing spplot map. Precisely, I have plotted a SpatialPixelsDataFrame of Pearson correlation coefficients between simulated and observed precipitation over the Mediterranean basin using spplot and I need to now add a contour line of the statically significant correlation coefficient at 95% CI.I have been vainly trying for several days to solve this issue, so I really need your help please
Best regards Bilel 
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