I have this probabilities:
$$P(x1) = 0.2$$ $$ P(x2) = 0.2$$ $$ P(x3) = 0.3$$ $$ P(x4) = 0.3$$ Probabilities
My problem have dependences so, I have to put 0 at the elements that can not be selected. For example, we have to choose first $x_1$ to take $x_2$, so $x_2$ will be 0, so my probabilities seems like:
$$ P(x1) = 0.25 $$ $$ P(x2) = 0 $$ $$ P(x3) = 0.375 $$ $$ P(x4) = 0.375$$
I have to choose one element, I generate a randon number between 0-1 if for example this number is 0.2 I choose $x_1$, but the problem it's how to know if I choose $x_2$ or $x_3$ because they have no range of values.
x1and not $x_1$, for instance? – José Carlos Santos Aug 12 '17 at 16:31