PPT Slide

Selecting Elements with 0/1 Arrays

• If a vector of 0’s and 1’s is used as a subscript of an array of the same length, the result is a new array containing only those elements of the old array with a 1 subscript.

• This is especially useful when the result of a logical expression is used as a subscript to select array elements based on some condition.

a = [12 7 21 3 8 14 0 6]

a([0 1 1 0 0 0 1 0])

b = a - 10

b > 0

b( b > 0 )

a( rem(a,3) ~= 0 )

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