Programmer Guide/SPU Reference/STAT

Mean and standard deviation of input A.

[SPU STAT A OUT MY SIGMA]

In	Out
Anumber	M Y = A {\displaystyle MY=A} $MY=A$ S I G M A = 0 {\displaystyle SIGMA=0} $SIGMA=0$
Avector	M Y = 1 n ∑ i = 0 n − 1 A [ i ] {\displaystyle MY={\frac {1}{n}}\sum _{i=0}^{n-1}A[i]} $MY={\frac {1}{n}}\sum _{i=0}^{n-1}A[i]$ S I G M A = 1 n − 1 ∑ i = 0 n − 1 ( A [ i ] − M Y ) 2 {\displaystyle SIGMA={\sqrt {{\frac {1}{n-1}}\sum _{i=0}^{n-1}(A[i]-MY)^{2}}}} $SIGMA={\sqrt {{\frac {1}{n-1}}\sum _{i=0}^{n-1}(A[i]-MY)^{2}}}$

with: n = length of A_vector

See also

<SP-atoms>