Hello R users, and perhaps William Revelle in particular, I'm curious as to how ICC deals with missing data, so for example you are sampling individuals over set periods in time and one individual is missing or was not recaptured at that given time point - leading to NA in the dataset. My thought was that it should then omit data by individual, but I'm not convinced that that is what it is doing? Does anyone know, I have looked at ?ICC but there is no information there, apologies if I have missed it in any other help file, I have looked, but to no avail! Thanks in advance, Ross -- View this message in context: http://n4.nabble.com/Intra-Class-correlation-psych-package-missing-data-tp1773942p1773942.html Sent from the R help mailing list archive at Nabble.com.
William Revelle
2010-Jun-08 23:42 UTC
[R] Intra-Class correlation psych package missing data
Ross, My apologies, I just discovered your email (from April) to the R-help list serve asking about ICC in psych. ICC does not remove missing data but rather lets the ANOVA handle it. It is probably more appropriate work on complete cases (as does the icc in the irr package). that is my.data <- na.omit(my.data) ICC(my.data) I have just fixed ICC so that it will by default use na.omit and thus work on complete cases. This will be in the psych 1.0.89 release which should be ready by this weekend. Bill At 4:21 AM -0800 4/8/10, RCulloch wrote:>Hello R users, and perhaps William Revelle in particular, > >I'm curious as to how ICC deals with missing data, so for example you are >sampling individuals over set periods in time and one individual is missing >or was not recaptured at that given time point - leading to NA in the >dataset. My thought was that it should then omit data by individual, but I'm >not convinced that that is what it is doing?You are completely correct.> >Does anyone know, I have looked at ?ICC but there is no information there, >apologies if I have missed it in any other help file, I have looked, but to >no avail!> >Thanks in advance, > >Ross >-- >View this message in context: >http://n4.nabble.com/Intra-Class-correlation-psych-package-missing-data-tp1773942p1773942.html >Sent from the R help mailing list archive at Nabble.com. > >______________________________________________ >R-help at 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.