R help - Jan 2015 - How to get items for both LHS and RHS for only specific columns in arules?‏

Hi all, I have a question about the arules package in R. I hope the example
tables are readable in your email, otherwise you can view it in the question.txt
in the attachment.Within the apriori function in the arules package, I want the
outcome to only contain these two variables in the LHS HouseOwnerFlag=0 and
HouseOwnerFlag=1. The RHS should only contain attributes from the column
Product. For instance:   lhs                   rhs                              
support   confidence lift1 {HouseOwnerFlag=0} => {Product=SV 16xDVD M360
Black}          0.2500000 0.2500000 1.0000002 {HouseOwnerFlag=1} =>
{Product=Adventure Works 26" 720p}      0.2500000 0.2500000 1.0000003
{HouseOwnerFlag=0} => {Product=Litware Wall Lamp E3015 Silver}0.1666667
0.3333333 1.3333334 {HouseOwnerFlag=1} => {Product=Contoso Coffee Maker 5C
E0900} 0.1666667 0.3333333 1.333333So now I use the following: rules <-
apriori(sales, parameter=list(support =0.01, confidence =0.8, minlen=2),
appearance = list(lhs=c("HouseOwnerFlag=0",
"HouseOwnerFlag=1")))Then I use this to ensure that only the Product
column is on the RHS: inspect( subset( rules, subset = rhs %pin%
"Product=" ) )The outcome is like this (for the sake of readability, I
omitted the colomns for support, lift, confidence):    lhs                      
rhs 1 {ProductKey=153, IncomeGroup=Moderate, BrandName=Adventure Works }   =>
{Product=SV 16xDVD M360 Black} 2 {ProductKey=176, MaritalStatus=M,
ProductCategoryName=TV and Video } => {Product=Adventure Works 26" 720p}
3 {BrandName=Southridge Video, NumberChildrenAtHome=0 }                =>
{Product=Litware Wall Lamp E3015 Silver} 4 {HouseOwnerFlag=1,
BrandName=Southridge Video, ProductKey=170 }      => {Product=Contoso Coffee
Maker 5C E0900} So apparently the LHS is able to contain every possible column,
not just HouseOwnerFlag like I specified.  I see that I can put
default="rhs" in the apriori function to prevent this, like so: rules
<- apriori(sales, parameter=list(support =0.001, confidence =0.5, minlen=2),
appearance = list(lhs=c("HouseOwnerFlag=0",
"HouseOwnerFlag=1"), default="rhs")) Then upon inspecting
(without the subset part, just inspect(rules), there are far less rules (7) than
before but it does indeed only containHouseOwnerFlag in the LHS:    lhs         
rhs                                 support  confidence lift1 {HouseOwnerFlag=0}
=> {MaritalStatus=S}                    0.2500000 0.2500000 1.0000002
{HouseOwnerFlag=1} => {Gender=M}                           0.2500000
0.2500000 1.0000003 {HouseOwnerFlag=0} => {NumberChildrenAtHome=0}           
0.1666667 0.3333333 1.3333334 {HouseOwnerFlag=1} => {Gender=M}               
0.1666667 0.3333333 1.333333However on the RHS there's nothing from the
column Product in the RHS. So it has no use to inspect it with subset as
ofcourse it would return null. I tested it several times with different support
numbers to experiment and see if Product would appear or not, but the 7 same
rules remain the same.So my question is, how can I specify both the LHS
(HouseOwnerFlag) and RHS (Product)? What am I doing wrong?You can reproduce this
problem by downloading this testdataset from the attachment (testdf.txt) or via
this link:https://www.dropbox.com/s/tax5xalac5xgxtf/testdf.txt?dl=0 Mind you, I
only took the first 20 rows from a huge dataset (12 million), so the output here
won't have the same product names as the example I displayed above. But the
problem still remains the same. (if you would like to have the entire dataset I
can email it ofcourse). I want to be able to get only HouseOwnerFlag=0 and/or
HouseOwnerFlag=1 on the LHS and the column Product on the RHS. I asked this
question on other forum before, but no response at all unfortunately. Since this
mailinglist is dedicated to R only I thought you guys might be able to help me.
Thanks in advance! I look forward to hear from you.Kim
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