Displaying 2 results from an estimated 2 matches for "dataindex".
2005 Aug 16
2
quirky behavior from rbinom (PR#8071)
...sion from: (NULL) (129.98.60.134)
This seems strange. I have a small block of code that repeatedly calls rbinom.
I put a break in there in case it returns NaN, as I've been having problems with
this. Here is a transcript from the debug session:
Browse[1]> theP
[1] 1
Browse[1]> yleft[dataIndex]
[1] 3
Browse[1]> rbinom(1,3,1)
[1] 3
Browse[1]> rbinom(1,yleft[dataIndex], theP)
[1] NaN
Strange, huh?
2009 Apr 16
0
manipulating data via the factors of a term in a lm()
...A B C Y1 Y2
1 1 1 1 22 6
2 2 1 1 22 2
3 3 1 1 16 11
4 4 1 1 2 13
5 1 2 1 0 19
6 2 2 1 -2 -7
7 3 2 1 5 8
8 4 2 1 37 -9
9 1 1 2 10 5
10 2 1 2 5 14
11 3 1 2 16 4
12 4 1 2 18 8
13 1 2 2 17 8
14 2 2 2 18 16
15 3 2 2 10 21
16 4 2 2 -16 5
I need a similar function dataIndex(mod, term):
dataIndex(mod,"A")
--> same as
> test$A
[1] 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
dataIndex(mod,"A:B") should deliver
[1] 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
# find sequential indices for observations in a data frame
# corresponding to the unique combinations of t...