R/readSparseDataFromConnection.R

In aydindemircioglu/SVMBridge: A Bridge to Integrate Different 'SVM' Solvers into R

#
# SVMBridge
#		(C) 2015, by Aydin Demircioglu
#
#		readSparseDataFromConnection .R
#
# SVMBridge is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# SVMBridge is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# Please do not use this software to destroy or spy on people, environment or things.
# All negative use is prohibited.
#


#' Read sparse data from an open connection.
#'
#' @param	con		Connection to read from
#' @param 	verbose		Be verbose?
#' @param	zeroBased		Do the indicies in the file start with 0, e.g. -1 0:2 1:4 ...?
#'
#' @return	L		list containing input data and labels
#'
#' @export
readSparseDataFromConnection = function (con, zeroBased = FALSE, verbose = FALSE) {
    # where are we?
    currentPosition = seek(con)

    # get filename
    filename = summary(con)$description

    # call readSparseData skipping to the current Position
    L = readSparseData (filename, skipBytes = currentPosition, verbose = verbose, zeroBased = zeroBased)

    return (L)
}