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Unitize

gives 0 when x is zero, and 1 when x has any other numerical value.

Details

Unitize[x,dx] gives 0 for any x with magnitude less than dx.
Unitize[x] gives 0 whenever x==0 yields True.
Unitize[x] in general works using PossibleZeroQ, and can handle numbers represented in symbolic form.
Unitize has attribute Listable.

Examples

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Basic Examples (2)

Convert numerical values to zero or one:

Replace values in a matrix with zeros or ones:

Show a plot that emphasizes structure:

Applications (1)

Determine if a sparse matrix is structurally symmetric:

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