location parameter
scale parameter
standard deviation
var y = stdev( 0.0, 1.0 );
// returns ~2.161
var y = stdev( 5.0, 2.0 );
// returns ~8028.534
var y = stdev( NaN, 1.0 );
// returns NaN
var y = stdev( 0.0, NaN );
// returns NaN
var y = stdev( 0.0, 0.0 );
// returns NaN
Returns the standard deviation for a lognormal distribution with location
mu
and scalesigma
.Notes
sigma <= 0
, the function returnsNaN
.