Dear list members,
 
I would like to look for attributes (e.g. distance from the shore) of spatial points in other data sets (e.g. dist_shoreDF)  after matching the points in fishlocationDF and dist_shoreDF by their coordinates.
 
fishlocationDF$dist=dist_shoreDF$dist[match(dist_shoreDF$coordinates, fishlocationDF$coordinates)] does not work 
but illustrates what I am trying to do. 
 
How can I deal with the two coordinates that every point has ? Would it be possible to coerce both x and y-coordinate into one column in order in order to apply the match() function ? Or is there a better way of approaching this ? I would be grateful for a hint.
 
 Thank you for your time.
 
Juliane 

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