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write and the S4 methods to
write transactions or associations (itemsets, rules) to disk.
write(x, file = "",...)
"write"(x, file="", format = c("basket", "single"), sep=" ", quote=TRUE, ...)
"write"(x, file="", sep=" ", quote=TRUE, ...)quote=TRUE and
sep=","
for saving data as in csv format.write.table
or write. Use fileEncoding to set the encoding used for
writing the file.write first uses coercion
to data.frame to obtain a printable form of
x and then uses write.table to write the data to disk.Transactions can be saved in basket (one line per transaction) or in single (one line per item) format.
Note: To save and load associations in compact form, use save and
load from the base package. Alternatively, association can be
written to disk in PMML (Predictive Model Markup Language)
via write.PMML. This requiresvpackages pmml.
read.transactions for reading transactions from a file,
read.PMML and write.PMML
for reading/writing associations in PMML format,
write.table (in base),
transactions-class,
associations-class
data("Epub")
## write the formated transactions to screen (basket format)
write(head(Epub))
## write the formated transactions to screen (single format)
write(head(Epub), format="single")
## write the formated result to file in CSV format
write(Epub, file = "data.csv", format="single", sep = ",")
## write rules in CSV format
rules <- apriori(Epub, parameter=list(support=0.0005, conf=0.8))
write(rules, file = "data.csv", sep = ",")
unlink("data.csv") # tidy up
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