I have an Excel file with x, y coordinates (lat, lon) and also a value column for my index of interest. I added the data using
file->Add data->Add xy data
Then I want to produce a 'grid' of this point data I have added (to produce a nice map of course). I then used the 'feature to raster' option within the conversion toolbox, and I set the grid size to 0.5 (what I'm interested in). This produces a grid of my data with the values categorised by colour. Then, I try to clip it using a world map coastline using
in the 'Data management'toolbox. It never seems to work however. All it seems to do is produce a new raster (grayscale) of the data, with nothing clipped out around the coastline boundaries.