| read_transactions {opusminer} | R Documentation |
Read Transaction Data from a File (Fast)
Description
read_transactions reads transaction data from a file fast, providing a
significant speed increase over alternative methods for larger files.
Usage
read_transactions(filename, sep = " ", format = "list")
Arguments
filename |
A filename. |
sep |
The separator between items (default " "). |
format |
The output format ("list" or "transactions"). |
Details
read_transactions uses (internally) the readChar
function to read transaction data from a file fast. This is substantially
faster for larger files than alternative methods.
Files should be in the format of a list of transactions, one line per
transaction, each transaction (ie, line) being a sequence of item labels,
separated by the character specified by the parameter sep (default "
"). See, for example, the files at http://fimi.ua.ac.be/data/.
Value
The transaction data, in the form of a list (of transactions, each
list element being a vector of character values representing item labels), or
an object of class transactions (arules).
Examples
## Not run:
trans <- read_transactions("mushroom.dat")
trans <- read_transactions("mushroom.dat", format = "transactions")
## End(Not run)