## Unique entries in a vector

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It is surprising how often you need to know only the unique entries in a vector of entries. In python, we create a “set” from a list, which only contains unique entries. Then we convert the set back to a list.

a = [1, 1, 2, 3, 4, 5, 3, 5]

b = list(set(a))
print b

[1, 2, 3, 4, 5]

a = ['a',
'b',
'b',
'c',
'd',
'b']

print list(set(a))

['a', 'c', 'b', 'abracadabra', 'd']


Copyright (C) 2013 by John Kitchin. See the License for information about copying.

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