RapidMiner Studio provides the Print to Console operator. This is a very simple operator that outputs a value to the Log view (enabled from the GUI View menu). This value can be a macro or a string. As a process executes, its progress can be monitored by observing the Log view.

The following screenshot shows a small portion of a logfile corresponding to the output from two Print to Console operators. The first operator logs the value of a macro, whereas the second operator outputs the text directly:

The text Hello world in a macro is the content of a macro, whereas Hello world directly is the text entered into the Log to Console operator. The process to do this is called consoleLog.xml and is available with the files that accompany this book.