

Something popped into my head recently, and now I am trying to write an equation
for the cumulative distribution function of a probability density function using
sum ().
I'm using a normal distribution, but when I try to graph the summation of the
values over the range of 0 through 5, I get unexpected results.
I tried using N, then since i is related to N, I tried seeing what that result
looked like, and then I averaged them... It makes no sense that a graph of a
running tally starts to decrease, instead of being nondecreasing and
rightcontinuous like it should be.
#declare NDist = function (N, mu, sigma)
{1/(sigma*sqrt(tau))*exp(0.5*pow((Nmu)/sigma,2))}
#declare NDist_cdf = function (N, mu, sigma) {sum (i, 0, N, NDist (N, mu,
sigma))}
#declare NDist_cdf2 = function (N, mu, sigma) {sum (i, 0, N, NDist (i, mu,
sigma))}
#declare NDist_cdf3 = function (N, mu, sigma) {sum (i, 0, N, NDist ((i+N)/2,
mu, sigma))}
Has anyone ever tried to use sum () to graph a running tally of a function, or
have any idea what I'm doing wrong?
Have I broken POVRay _*AGAIN*_???!
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