Hello, One more time,i have a question about a function in multtest! I'm wondering how change the xlim and ylim when i use the mt.plot. Because it doesn't work if i want to have the legend too.And i have another question about mt.plot: - How do you explain the results of the mt.plot with the option "rvsa"? because i have calculate with a programm how many rejected hypotheses there are ,and i find the same results on graph if i say that is a cumulative distribution graph (repartition).I don't know if that's right! - How can i oblige R to make more tickmarks between the main tickmarks which have already drawn? I'm apologize to annoy you nearly every day!!!! Thanks a lot Sandrine mainard -------------------------------------------------------------------------------- Université de Bretagne sud http://www.univ-ubs.fr/