| # |
| # 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) |
| |
| # Initialize SparkContext and SQLContext |
| sc <- sparkR.init(appName="SparkR-DataFrame-example") |
| sqlContext <- sparkRSQL.init(sc) |
| |
| # Create a simple local data.frame |
| localDF <- data.frame(name=c("John", "Smith", "Sarah"), age=c(19, 23, 18)) |
| |
| # Convert local data frame to a SparkDataFrame |
| df <- createDataFrame(sqlContext, localDF) |
| |
| # Print its schema |
| printSchema(df) |
| |
| # Stop the SparkContext now |
| sparkR.stop() |
