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m rv myself (sgn(x) can't fit this definition) and clarify which H(x) does fit this definition as a special case. |
m "step fn"->"a step fn" |
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In [[mathematics]], a [[function (mathematics)|function]] on the [[real number]]s is called a '''step function''' if it can be written as a finite [[linear combination]] of [[indicator function]]s of [[half-open interval]]s. Informally speaking, a step function is a piecewise constant function having only finitely many pieces.
[[Image:StepFunctionExample.png|thumb|right|250px|Example of a step function with n=4.]]
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