r - Error while trying to target in arules (data is in the format of web addresses) -

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i've imported data r transactions, when try targeting specific website, error:

error in asmethod(object) : facebook.com unknown item label

is there reason why happening? here snippet of code:

target.conf80 = apriori(trans, parameter = list(supp=.002,conf=.8), appearance = list(default="lhs",rhs = "facebook.com"), control = list(verbose = f)) target.conf80 = sort(target.conf80,decreasing=true,by="confidence") inspect(target.conf80[1:10])

thanks!

here transactions like:

1 {v1=google,                                      v2=google web search,                           v3=facebook.com}                           1 2 {v1=facebook.com,                                v2=mcafee.com,                                  v3=7eer.net,                                    v4=google}                                 2 3 {v1=mcafee.com,

the problem way read/convert data transactions. transactions should like:

1 {google,                                      google web search,                           facebook.com}                           1 2 {facebook.com,                                mcafee.com,                                  7eer.net,                                    google}                                 2  3 {mcafee.com,     ...

without v1, v2, etc. in transactions v1=google , v4=google different items.


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