Returns the standard deviation of a Rayleigh distribution.
σ < 0
NaN
scale parameter
standard deviation
var v = stdev( 9.0 ); // returns ~5.896
var v = stdev( 2.0 ); // returns ~1.31
var v = stdev( -0.2 ); // returns NaN
var v = stdev( NaN ); // returns NaN
Returns the standard deviation of a Rayleigh distribution.
Notes
σ < 0
, the function returnsNaN
.