Hi In a dataset I have length and age for cod. The age, however, is ony given for 40-100% of the fish. What I need to do is to fill inn the NAs in a correct way, so that age has a value for each length. This is to be done for each sample seperately (there are 324 samples), meaning the NAs for sampleno 1 shall be calculated from the known values from sampleno 1.
As for example length 55 cm can be both 4 and 5 years, I guess a fish with NA age and length 55 cm should be given a "random" age given a probability for example "55 cm = 4 years has a p=75%, while 55 cm = 4 years has a p=25%". Those "p-values" should be calculated from the real data. How can this be done in R, and what is the right way to do it? Sample number 1 is given below. Best regards Torleif Markussen Lunde length age sampleno 55 5 1 45 4 1 55 4 1 55 5 1 60 6 1 45 5 1 52 5 1 48 4 1 51 6 1 53 4 1 54 5 1 48 5 1 50 6 1 55 6 1 55 4 1 50 5 1 49 5 1 40 4 1 50 6 1 36 4 1 46 6 1 35 3 1 41 3 1 44 5 1 36 3 1 29 2 1 28 2 1 32 2 1 31 2 1 30 2 1 29 2 1 32 2 1 28 2 1 25 2 1 27 2 1 27 2 1 24 2 1 27 2 1 24 2 1 19 1 1 23 1 1 23 1 1 20 1 1 23 1 1 19 1 1 17 1 1 53 5 1 58 5 1 52 4 1 42 3 1 50 5 1 94 7 1 35 3 1 71 7 1 52 6 1 50 6 1 45 4 1 52 5 1 37 3 1 45 4 1 59 5 1 47 4 1 48 4 1 39 3 1 37 3 1 31 3 1 39 2 1 39 2 1 31 2 1 40 3 1 52 5 1 62 5 1 72 5 1 53 5 1 61 5 1 54 6 1 54 5 1 63 6 1 58 5 1 45 4 1 43 4 1 55 4 1 39 3 1 39 3 1 58 5 1 65 6 1 52 6 1 48 3 1 49 3 1 44 3 1 45 4 1 35 2 1 38 3 1 30 2 1 29 1 1 27 1 1 44 NA 1 48 NA 1 37 NA 1 27 NA 1 30 NA 1 67 NA 1 28 NA 1 65 NA 1 42 NA 1 27 NA 1 37 NA 1 30 NA 1 28 NA 1 26 NA 1 36 NA 1 29 NA 1 32 NA 1 45 NA 1 39 NA 1 27 NA 1 29 NA 1 28 NA 1 27 NA 1 53 NA 1 21 NA 1 15 NA 1 23 NA 1 ______________________________________________ R-help@stat.math.ethz.ch 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.
