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Selecting records from a matrix subject to a condition

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Maroulator
Maroulator 2017-3-19
回答： Walter Roberson 2017-3-19
My matrix(M) looks like the data below; how can I pull the records that have a third column greater than or equal to 20?
1 0.4 12
2 1.3 20
3 1.2 15
4 2.1 21

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Walter Roberson
Walter Roberson 2017-3-19
M(M(:,3)>=20, :)

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