degrees of freedom
variance
var v = variance( 9.0 );
// returns ~1.286
var v = variance( 2.0 );
// returns Infinity
var v = variance( 0.5 );
// returns NaN
var v = variance( -0.2 );
// returns NaN
var v = variance( NaN );
// returns NaN
Returns the variance of a Student's t distribution.
Notes
1 < v <= 2
, the function returns positive infinity.v <= 1
, the function returnsNaN
.