Hello to everybody,

I have a huge geographic data labeled latitude and longitude (global).  I am
attempting to use Generic mapping tools to plot the distribution of the
events. I wish to obtain number of events per region on the map. Using
factor function, I have summed up the number of events on each block of
latitude and longitude and saved them respectively as x and y. I hoped I
could plot the matrix x and y by using color plot. But when I used >image(x,
y), the error message was   "Error in image.default(y, x) : increasing 'x'
and 'y' values expected".

I am learning R for the first time and I am not quite sure that my method
here is alright. I have just subscribed to this mailing list today so as to
get help.

I would therefore be grateful if you could guide me.
 Small portion of the data is:
  lat          lon
-5.1821 147.4462
-5.1826 147.3733
-5.1680 147.3855
31.4489 -63.2175
28.3199 -62.1831
-18.2495 -44.6471
-11.3654 -42.8249
-2.6652 -73.2344
-13.3543 -56.5338
27.9594 -157.9413
29.4454 -62.0620
-5.1953 116.0678
31.7057 -62.7211
-15.6194 124.6710
-7.1434 -72.2230
-19.1066 -45.665

Thank you
Ogbos

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