[R] Overlaying a single contour from a new data array in levelplot

[Jenny Barnes]

Dear R-Help community,

I am trying to overlay a single contour line over a correlation plot using 
levelplot in the lattice package. These are the two arrays:

1) a correlation plot over Africa - so each grid square is a different colour 
dependent on correlation - this is in an array: result_cor with dim[465,465]

2) a single contour line from a ***different data source*** - this is from data 
related to the p-values for the above correlation plot - I want to overlay only 
the 95% confidence contour. The p-values are stored in an array: result.p.values 
with same dimensions as above.

I have read about using panel.levelplot and panel.contourplot in the R-help 
mailing list but I don't know the right way to call two different data arrays, 
can anybody help me please? I appreciate your time and help with this question.

Many thanks,

Jenny 



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Jennifer Barnes
PhD student: long range drought prediction 
Climate Extremes Group
Department of Space and Climate Physics
University College London
Holmbury St Mary 
Dorking, Surrey, RH5 6NT
Tel: 01483 204149
Mob: 07916 139187
Web: http://climate.mssl.ucl.ac.uk