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How to use breakpoints to debug your RapidMiner process

sgenzersgenzer 12Administrator, Moderator, Employee, RapidMiner Certified Analyst, Community Manager, Member, University Professor, PM Moderator Posts: 2,519  Community Manager

 Breakpoints are SUPER USEFUL. They allow you to “pause” a process before it gets to the end so you can see what’s going on – at that particular point in your process. For example, open up Samples -> processes -> 01_Learner -> 01_DecisionTree.

 

image001.png

 

If you press PLAY, you will just see the result as normal:

 

Screen Shot 2018-08-07 at 11.22.45 AM.png

 

But say you want to see the data set BEFORE it goes into the Decision Tree operator – HERE:

 

Screen Shot 2018-08-07 at 11.21.33 AM.png

So that’s when you use a “breakpoint” – it allows you to pause the process before getting to the finish line. You do this as follows:

 

  1. Right-click the Retrieve operator and select “Breakpoint After” (or select the operator and press F7 on your keyboard).

Screen Shot 2018-08-07 at 11.25.57 AM.png 

    2. You should see a small red arrow now inside the Retrieve operator. This is indicating that you have placed a breakpoint.

 

 Screen Shot 2018-08-07 at 11.27.23 AM.png

 

Now press PLAY. You should see this:

 
Screen Shot 2018-08-07 at 11.29.37 AM.png

 

If you press PLAY (current in “pause”) again, you will see the final result as before.

 

To remove breakpoints, just right-click and select Breakpoint After again.

 

That's it! Super handy. Enjoy!


Scott

 

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