Quote Originally Posted by wysota View Post
I'm not sure what you mean but if you want the mean to be computed "by itself" simply compute it the first time someone requests to read the mean.
see the post #1 I edited it (now it's a bit more complex);
I thought that when Data is build, computeMean() must be called; when some changes in the datas occur, the mean should be computate again; to retrieve the mean there is a getMean() { return _mean; } method (there isn't in post #1 at moment).
"itself" mean capability of Feature of iterates on a its vector......