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medialist
2009 Jul 30
2
weight median by count for multiple records
...1002 2
1003 17
I have used the following script to calculate the median for a data
frame where each recorded distance has its own row, and where temp is
a dataframe containing each unique SubjectID and routes is the file I
describe above.
for(i in 1:nrow(temp)){
temp$mediandistance[i] <-
median(routes$Distance_miles[routes$Subject_ID==temp$Subject_ID[i]])
}
I am interested to know...
(1) Is there a way to incorporate a weighted median into this script,
where the weights are the number of times each distance is recorded?
(2) Can I transform my current matrix into one t...