Try pdist2() if you have the Statistics and Machine Learning Toolbox
D = [ 1 2 4]
I1 = [3 5 5 ]
I2 = [5 7 8 ]
I3 = [9 8 7 ]
I4 = [1 2 3 ]
IAll = [I1;I2;I3;I4]
distances = pdist2(D, IAll)
[minDistance, indexOfMinDistance] = min(distances)
You'll see:
D =
1 2 4
I1 =
3 5 5
I2 =
5 7 8
I3 =
9 8 7
I4 =
1 2 3
IAll =
3 5 5
5 7 8
9 8 7
1 2 3
distances =
3.74165738677394 7.54983443527075 10.4403065089106 1
minDistance =
1
indexOfMinDistance =
4
indexOfMinDistance will be 4, and since I put I4 into row 4, I4 has the closest distance to D.
