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#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
library(SparkR)
args <- commandArgs(trailing = TRUE)
if (length(args) != 1) {
print("Usage: wordcount <file>")
q("no")
}
# Initialize Spark context
sc <- sparkR.init(appName = "RwordCount")
lines <- textFile(sc, args[[1]])
words <- flatMap(lines,
function(line) {
strsplit(line, " ")[[1]]
})
wordCount <- lapply(words, function(word) { list(word, 1L) })
counts <- reduceByKey(wordCount, "+", 2L)
output <- collect(counts)
for (wordcount in output) {
cat(wordcount[[1]], ": ", wordcount[[2]], "\n")
}
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