DiscreteIndicator

DiscreteIndicator[x,x1,{u1,u2,}]

yields the discrete indicator function, equal to 1 if x=x1 and, otherwise, to 0 if x=ui for some i.

Details

Examples

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Basic Examples  (1)

Give 1 if the first arguments are equal:

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Give 0 if they are not equal:

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Out[2]=

If the first argument does not appear in the third argument, return unevaluated:

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Out[3]=

Applications  (1)

Properties & Relations  (2)

See Also

Boole  Piecewise  DiscreteDelta  If  Pick

Introduced in 2008
(7.0)