Displaying 2 results from an estimated 2 matches for "demo_name".
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2017 Dec 14
1
Aggregation across two variables in data.table
...ied          3
30-40K                 Rented 7.648642
6:  35                         Associate degree     Separated          2
10-15K                 Rented 7.496411
My objective is to calculate the average of Theta across all pairs of two
demographics.
For 1 demographic this is straightforward:
Demo_names <- c("Age", "Education", "Marital", "Familysize", "Income",
"Housing")
means1 <- as.list(rep(0, length(Demo_names)))
for (i in 1:length(Demo_names)) {
Demo_tmp <- Demo_names[i]
means1[[i]] <- data_tmp[,list(mean(Theta)),by=Dem...
2006 Aug 07
0
Doubts after generating with scaffold
...In both of them we are using the ?Thing.new? so? are we 
instantiating the thing twice?. I don?t understand this piece of code.
- For ?list? we use the pagination helper. The line of code is something 
like:
?@thing_pages, @things = paginate :things, :per_page => 10, :order_by => 
''demo_name''? I don?t understand the line. I can understand the code 
after the ?@things =?, but not the  ?@thing_pages,? code.
- I?ve also seen in tutorials with older versions that variables such as 
?flash? or ?params? are not passed with the at symbol. Do you know the 
why of these change?
If an...