Enterprise Internet of Things Handbook

Executing the R script

In this step, we are going to do data munging. We are going to rewrite the values of the isRain column in such a way that we get a Yes or NO answer instead of the WeatherType:

1. In the experiment, click on the Execute R Script item. On the right pane, we should see the following R script:

# Map 1-based optional input ports to variables data <- maml.mapInputPort(1) # class: data.frame data$isRain[grepl(""RA"", data$isRain)] <- ""Yes"" data$isRain[grepl(""SN"", data$isRain)] <- ""Yes"" data$isRain[grepl(""DZ"", data$isRain)] <- ""Yes"" data$isRain[grepl(""PL"", data$isRain)] <- ""Yes"" data$isRain[data$isRain != ""Yes""] <- ""NO"" # Select data.frame to be sent to the output Dataset port maml.mapOutputPort(''data''); ...