I am sorry to be bothering the list so much. I made a table of counts of flight arrivals by hour: cnts=tapply(Arrival4,list(Hour),table). There are up to 15 arrivals in a bin. > cnts $`0`
1 2 3 4 5 6 7 8 9 10 13 1 2 5 9 2 7 5 4 2 4 1 $`1` 1 2 3 4 3 2 2 1 $`2` 1 3 2 2 . . . My first problem is how to get this table filled in with the 0 slots. E.g., I want $`0` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 5 9 2 7 5 4 2 4 0 0 1 0 0 for all 24 hours. The elements of the tables are lists, but I do not seem to be able to extract the names of each list, which I think would allow this manipulation. My second problem is that I want to compute probability distributions. I have lambda 0 1 2 4 5 6 7 0.199190283 0.013765182 0.006477733 0.017813765 0.093117409 0.160323887 0.401619433 8 9 10 11 12 13 14 0.191093117 0.177327935 0.318218623 0.404858300 0.463157895 0.495546559 0.435627530 15 16 17 18 19 20 21 0.418623482 0.307692308 0.405668016 0.484210526 0.580566802 0.585425101 0.519028340 22 23 0.556275304 0.503643725 and I need to calculate lambda**cnts for each bin, and each hour. I am also unsure of how to do this. Thanks in advance kind people on this list Jim Rome ______________________________________________ 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.