write an equation from algorithm

hello

i have algorithm and i need help to write the equation for it

this is algorithm

thank you....

Answer 1

[Walter Roberson]

In general, equations derived from programs need to be written in something like Lambda Calculus. You might be able to work out a piecewise() representation that you could then convert to a messy system involving a bunch of Heaviside.

Answer 2

[Thorsten]

It interpret your question such that you do not ask for the equation, but for the Matlab implementation.

It's pretty straightforward to code this into Matlab. This should get you started:

function y = approxphi(x)
v = [1.25 ... ]% add all the v's here as a vector

j = floor(min([abs(x)+0.5, 14]));
z = j; h = abs(x) - z; a = v(j+1);
b = ...
c = log(sqrt(2*pi))
for i = 2:2:24-j

end