MATLAB: Comparison of two Vektors with different size to find variables

findvector

I have a problem with my read measurement datas.
A vector has a not quite continuous time series of 15 minutes values ​​for a period of 7 years. The second vector or matrix has a continuous (precipitation) time series of 15 minutes values. I have already tried a few things, but I can not come up with a solution to get a vector with the precipitation values ​​corresponding to the "correct" date from the first vector.
An example of my problem:
a = [731947,312500000 
731947,322916667 
731947,333333333 
731947,364583333 
731947,375000000 
731947,395833333 
731947,406250000] 
b = [731947,312500000   2 
731947,322916667   5 
731947,333333333   6 
731947,343750000   8 
731947,354166667   2 
731947,364583333   0 
731947,375000000   0 
731947,385416667   0 
731947,395833333   0 
731947,406250000   0] 
c= [731947,312500000   2 %This should be the result.
731947,322916667   5 
731947,333333333   6 
731947,364583333   0 
731947,375000000   0 
731947,395833333   0 
731947,406250000   0]

Best Answer

E.g.,
x = ismember(b(:,1:2),a(:,1:2),'rows');
c = b(x,:);
Depending on how the times were constructed, you might need to use ismembertol( ).
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