How to select data with identical lat lon from two large matrixes ?

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amberly hadden
amberly hadden 2015-5-11
评论： amberly hadden 2015-5-11
I have been working with the satellite data. So I have exported two matrices in matlab which contains nearly 230000 and 370000 rows and 3 columns respectively. The first 2 columns are latitude and longitude and next columns contain readings. what should I do to select the data so that out put is a matrix with latitude and longitude and next two columns gives reading for matrix 1 and 2.
M-1 Lat Lon Reading M2 Lat Lon Reading
23 56 1 24 58 3
24 58 2 25 54 5
26 59 3 27 58 6
22 57 4 23 56 9
25 54 5 26 59 8
29 51 6 30 60 4
22 52 7 23 54 2
21 50 8 22 56 3
Result Lat Lon M1 M2
23 56 1 9
24 58 2 3
26 59 3 8
Thanks, in advance

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Walter Roberson
Walter Roberson 2015-5-11
M1LL = M1(:,1:2);
M2LL = M2(:,1:2);
[M1inM2, M2idx] = ismember(M1LL, M2LL, 'rows');
joinedM1M2 = [M1(M1inM2,:), M2(M2idx(M1inM2), 3)];
  2 个评论
amberly hadden
amberly hadden 2015-5-11
My be its a rounding error ? as when I applied it to roigonal data set the output is an empty matrix.. I'm trying to round the digits to two decimals and then apply it. Thanks

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