Using logical indexing to plot points meeting a specific criteria only.
>> L = logical([0 1 0 1])
L =
0 1 0 1
>> a = [1 2 3 4]
a =
1 2 3 4
>> a(L)
ans =
2 4
>> L = logical([0 1 0 1])
L =
0 1 0 1
>> a = [1 2 3 4]
a =
1 2 3 4
>> a(L)
ans =
2 4
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