I'm sure there are better, more elegant ways avoiding the nested loop I'm
suggesting - but if it was my problem, here is what I would do (assuming that
my understanding of your question is correct):
### separate function for 'doing something' with the data subset
do.something <- function( qA, qB )
{
# printing the response subsets as a substitute for your "do something"
print( qA )
print( qB )
# you could use a list here to organise or return your results
}
### vector containing the numbers of the areas
areas <- unique( yrData$Area )
### extract question headers
questions <- colnames( yrData )[ !colnames( yrData ) %in% c( "Area", "Facility"
) ]
### loop through your Area
for( i in areas )
{
# subset per Area
yrSubData <- yrData[ yrData$Area == i, ]
# vector containing the Facilities in that Area
facilities <- yrSubData$Facility
# loop through your Facilities
for( j in facilities )
{
# get subsets
A <- yrSubData[ yrSubData$Facility != j, ]
B <- yrSubData
# for each combination of subsets, loop through the questions
for( q in questions )
{
do.something( A[ q ], B[ q ] )
}
}
}
Output:
Q1
2 3
3 1
Q1
1 2
2 3
3 1
Q1
1 2
3 1
Q1
1 2
2 3
3 1
Q1
1 2
2 3
Q1
1 2
2 3
3 1
Q1
5 5
6 2
Q1
4 4
5 5
6 2
Q1
4 4
6 2
Q1
4 4
5 5
6 2
Q1
4 4
5 5
Q1
4 4
5 5
6 2
which is what I think should satisfy your need as a first step.
Rgds,
Rainer
On Wednesday 14 August 2013 07:20:24 Derickson, Ryan, VHACIN wrote:
> Hello all,
>
> I've tried to solve this for weeks and posted to other forums with
> little success- I'd appreciate any help from anyone.
>
> I have survey data grouped by facility and area (area is a collection of
> facilities). Questions are q1-q10.
>
> For each facility, I need to subset each item into the facility's
> responses, and the facility's area responses excluding the facility.
> This might illustrate it better:
>
> Area Facility Q1... Q10
> 1 1 2
> 1 2 3
> 1 3 1
> 2 4 4
> 2 5 5
> 2 6 2
>
> A<- Select Q1 for all Area=1 and Facility!=1; B<- Select Q1 for all
> Facility=1; <do something with A and B>
> A<- Select Q1 for all Area=1 and Facility!=2; B<- Select Q1 for all
> Facility=2; <do something with A and B>
> A<- Select Q1 for all Area=1 and Facility!=3; B<- Select Q1 for all
> Facility=3; <do something with A and B>
> ...
> A<- Select Q10 for all Area=2 and Facility!=6; B<- Select Q10 for all
> Facility=6; <do something with A and B>
>
> I know how to write the code to manually pull each subset, but I have a
> lot of facilities and areas that get renamed from year to year so I need
> to "vectorize" my code so each subset doesn't have to be explicitly
> called by area or facility name.
>
> Again, I would be incredibly appreciative of any help. I'm at a
> dead-end.
>
>
> Ryan
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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