Displaying 2 results from an estimated 2 matches for "age10".
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age1
2011 Feb 28
3
Measuring correlations in repeated measures data
...from package nlme, where the model is:
fit <- lmer(distance ~ age + (1 | Subject), data=Orthodont)
I would like to measure the correlation b/t the variable "distance" at different ages such that I would have a matrix of correlation coefficients like the following:
age08 age09 age10 age11 age12 age13 age14
age08 1
age09 1
age10 1
age11 1
age12 1
age13 1
age14 1
The idea would be to demonstrate that the correlations b/t repeated me...
2010 Feb 11
1
Rounding multinomial proportions
...he 'stats' package,
with the other multinomial functions reside.
I'm using R to export data to text files, which are input data for an
external model written in C++. Parts of the data are age distributions, in
the form of relative frequency in each year:
Year Age1 Age2 ... Age10
1980 0.123 0.234 ... 0.001
... ... ... ... ...
Each row should sum to exactly 1. The problem is that when I preprocess
each line in R as p<-a/sum(a), occasionally a line will sum to 0.999,
1.002, or the like. This could either crash the external model or lead to
wrong conc...