calculating a set of z-scores :: Please explain how to represent this procedure

Hello! I need to know how to represent this procedure mathematically. I am trying to have a program of mine published, but I need to represent this as an equation to the best of my abilities first!

I will first explain how the operation works, and then I will display my attempt at it.

PROCEDURE:

We have two lists of elements: subjects and targets **(i's & j's)** *These elements are actually protein sequences. We have two text files each containing our subjects and targets respectively*

Now, we have two functions:

$\displaystyle \displaystyle Sw(i,j) = R$

$\displaystyle \displaystyle Sw^\prime(i) = \{j_1,j_2,j_3\}$

In other words, the Sw() function takes two elements : a subject sequence (i) and a target sequence (j) and returns a raw numerical bit-score called "R".

Now, the Sw'() function will take 1 subject sequence (i) and return 3 targets (j's).

Now, here is the procedure I need proper mathematical syntax: I have I written this in pseudo-code/python (lol)

Code:

`from numpy import std,average,shuffle`

answers = []

shuffled_Rs = []

def myscores(i):

for j in Sw_prime(i):

R = Sw(i,j)

for i in range(500):

shuffled_j = shuffle(j)

shuffled_Rs.append( Sw(i,shuffled_j) )

standard_deviation = std(shuffled_Rs)

average = mean(shuffled_Rs)

z_score = (R - average) / standard_deviation

answers.append(z_score)

return answers

Each R value is normalized by generating 500 more bit scores with shuffled j's, then a standard score is calculated.

Long story short, I feed program one "i" value, and it will return 3 z-scores.

I need to represent this process mathematically. I can define the Sw, Sw' and Shuffle functions in text.

Here is how I attempted it:

Sw’ (i) = {j1, j2, j3} = T

http://i.imgur.com/SPcDP.png

Thanks a lot!