variance

pure nothrow @property @nogc

(

)

(

in T[] arr

)

if (

is(typeof(T.init + T.init) == T) &&

is(typeof(T.init - T.init) == T)

is(typeof(T.init * T.init) == T)

is(typeof(T.init / 1UL) == T)

)

in { assert (arr.length > 1); }

Examples

1 auto a = [ 1.0f, 1, 1 ];
2 assert( a.variance == 0.0f );
3 
4 auto b = [ 1.0f, 2, 3 ];
5 assert( b.variance == 1.0f );

import des.math.linear.vector;

auto a = [ vec3(1,2,3), vec3(2,3,4), vec3(3,4,5) ];
assert( a.variance == vec3(1,1,1) );