Welcome to R Barbara. Its quite an incredible community from all walks of life.
Your beginner questions are answered in the manual. See Introduction to R. Please read the posting guide again because it contains lots of good advice for you. Some people read it three times before posting because they have so much respect for the community. Sometimes they trip up over themselves to show they have read it. Btw - just to let you know that starting your subject lines with "IMPORTANT" is considered by some people a demanding tone for free help. Not everyone, but some people. Two posts starting IMPORTANT within 5 minutes is another thing that a very large number of people around the world may have just seen you do. I'm just letting you know, in case you were not aware of this. You received answers from four people who clearly don't mind, and you have your answers. Was that your only goal in posting? Did you consider there might be downsides? This is a public list read by many people and one thing the posting guide says is that your questions are saved in the archives forever. Just checking you knew that. I wouldn't want you to reduce your reputation accidentally. A future employer (it might be a company, or it might be a university) anywhere in the world might do a simple search on your name, and thats why you might not get an interview, because you had showed (in their minds) that you didn't have respect for guidlines. I would hate for something like that to happen, all just because you didn't know you were supposed to read the posting guide, it wouldn't be fair on you. So it would be very unfair of me to know that, and suspect that you don't, but not tell you about the posting guide, wouldn't it ? I hope this information helps you. It is entirely up to you. r-help is a great way to increase your reputation, but it can reduce your reputation too. By asking great questions, or even contributing, you can proudly put that on your CV and increase your chances of getting that interview, or getting that position. I have seen on several CVs from students the text "please search for my name on r-help". Just like everything you do in public, r-help is very similar. What you write, you write in the public domain, and you write it free of charge, and free of restriction. All this applies to all us. When asking for help, and when giving help. Matthew <barbara.r...@uniroma1.it> wrote in message news:of1a8063a1.fc14f5ff-onc12576e1.00466053-c12576e1.00466...@uniroma1.it... > > I have a vector that have null elements. How to remove these elements? > For example: > x=[10 0 30 40 0 0] I want the vector y=[10 30 40] > Thanks > [[alternative HTML version deleted]] > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.