| WRITE {arules} | R Documentation |
Provides the generic function WRITE and the S4 methods to
write transactions or associations (itemsets, rules) to disk.
WRITE(x, file = "",...)
x |
the transactions or associations (rules, itemsets, etc.) object. |
file |
either a character string naming a file or a connection open for writing. '""' indicates output to the console. |
... |
further arguments passed on to write.table. |
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.
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). This requires
the packages pmml and XML. See Examples section for usage.
write.table (in base),
transactions-class,
associations-class
data("Epub")
## write the formated result to screen
WRITE(head(Epub))
## write the formated result to file in CSV format
WRITE(Epub, file = "data.csv", sep = ",", col.names = NA)
## write rules in CSV format
rules <- apriori(Epub, parameter=list(support=0.002, conf=0.8))
WRITE(rules, file = "data.csv", sep = ",", col.names = NA)
unlink("data.csv") # tidy up
## write rules as PMML
library(pmml)
rules_pmml <- pmml(rules)
saveXML(rules_pmml, "data.xml")
unlink("data.xml") # tidy up