Using the R extension in a Qlik Sense application

After our preparation in the previous section, the Qlik Sense box is ready to use R as SSE. Let's carry out a simple test to check if the R installation is running properly:

1. Open Qlik Sense Desktop (or Enterprise) and create a new application, or open an existing one.
2. Add a KPI with this simple expression that prints a math result (1+2): R.ScriptEvalStr('print(1+2)').
3. Verify that the Qlik Sense KPI has an output that looks like this:

If it does not print exactly 3, we have to check the logs so that we have an idea about what went wrong. Close Qlik Sense and check the logs, particularly [yourmachine]_SSE_Engine_[date].log, where there will be useful troubleshooting information.

Let's use a more complex test to check if our scripts are accepting aggregations as parameters. Using the application that we created...