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ok, sorry, my mistake was the C printf. Thank you for your good answer Regards ----- Message d'origine ---- De : JS Ubei <jsubei at yahoo.fr> ? : jim holtman <jholtman at gmail.com> Cc : r-help at r-project.org Envoy? le : Jeudi, 17 Juillet 2008, 15h25mn 07s Objet : [R] Re : float and double precision with C code thank you for your quick answer, I'm far of the digits capacity and my values are not the result...

...this In R console, this is correct and what I need : > my_value <- 29.958334 > my_value == 29.958334 [1] TRUE But I need to do the first operation (my_value <- 29.958334) in C Regards, ----- Message d'origine ---- De : jim holtman <jholtman at gmail.com> ? : JS Ubei <jsubei at yahoo.fr> Cc : r-help at r-project.org Envoy? le : Jeudi, 17 Juillet 2008, 14h56mn 01s Objet : Re: [R] float and double precision with C code FAQ 7.31 Also read "What Every Computer Scientist Should Know About Floating-Point Arithmetic", ACM Computing Surveys, 23/1, 5?48, also av...

hi dear R users, I'm a newbie with R and excuse me if my question is stupid ... but i've read lot of documentation and I don't know how to do. I have a dataset like x y var1 var2 2 4 10 50 3 3 20 70 3 2 50 68 4 5 34 42 5 3 10 23 7 8 23 42 7 3 23 34 [...] And I need to produce grids like : y\x ]0-2] ]2-4]

Hi dear R users, I'm a R beginner and I have a basic question about sequential treatments of lists. I have a time based (i.e. events are consecutive) list of values of a biological property. Like : time value 1 5 2 10 3 7 4 10 5 19 6 21 7 20 8 18 9 10 10 7 11 8 12 12 13 17 14 19 15 24 16 18 17 15 18