Suppose I have a certain matrix A in form
28 77 145 127 29 77 166 877 30 77 176 822 31 77 232 188 28 78 252 611 29 78 222 112 30 78 236 211 31 78 122 122
where the first two columns are lat and lon resp and the next two are data and another matrix B
28 78 252 611 29 78 222 112
I need to condition on the lat and lon and remove matrix B from matrix A. I could do this with for loop, I need to do it without looping if possible
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