[R] Program with indicatrix function

[MarcioRibeiro]

Hi listers,
First I programmed the calcul of a empirical distribution function given by:

F_hat(y)=(1/n)*Sum[Ind(yi<=y)]

I checked the ecdf function and I found out how does it works...
A modification of the function would be:
n<-6
x<-c(10,12,7,7,5,4)
vals<-unique(x)
edf<-cumsum(tabulate(match(x, vals)))/n
But, what I am really looking for is this:

P_hat(y)=Sum[Ind(yi<y)]

At this case my indicatrix function has no equality...
So, I was tryind to program with IF and ELSE...
But it seems kind of complicated...
Could anybody give me any clue, like the algorithm idea...
Thanks in advance,
Marcio
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