Description Usage Arguments Examples

`"Bisquare"`

evaluates Tukey's Bisquare function defined as

*f(r)=1-(1-(r/c)^2)^3) if |r|<=c*

*f(r)=1 if |r|>c *

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`r ` |
a real number or vector. |

`c ` |
a positive number. If the value is negative, it's absolute value will be used. |

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