function to get to extract quantiles
get.quantiles(mylist, quantiles, single)get.ind.quantiles(outmat, inmat)
list
matrix
list of matrices of two cols x, y
vector with the desired quantiles
NULL or TRUE if only a single node and parameter
matrix where the first col has the desired quantiles. We want to estimate this and out in into the second col
is the actual x,f(x) matrix
get.ind.quantiles()
: helper function for get.quantiles