


hi,

i have a longitude vector (x) a latitude vector (y) and a matrix of bathymetry (z) with the dimensions (x,y). I have already succeeded in plotting it with the image.plot (package 'field') and the contour functions.

But now, I want to make a grid in order to extract easily the bathymetry corresponding to a couple of longitude, latitude coordinates. 

Do you know a function or a package which can help me? Or do you know how to do it? (because i have already looked for it on the internet and i didn't find anything)

Thanks a lot.

Karine






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