![]() #Rapidminer studio 6.4 download for free#You can download these extensions for free from our Marketplace. ![]() Well this is a bigger project and nobody here will probably be able to describe the complete solution in a single post :-)īut here are some hints to get you started:įor all types of text analysis (including sentiment analysis and other), you will need an extension for RapidMiner: Please refer to the visualisation sample processes and the RapidMiner operator manual for further details. This process demonstrates two other features of the feature operators of RapidMiner: the stop button which allows the abort of the process if the user was already satisfied and the ProcessLog operator which allows online plotting of current fitness values. In this case, a genetic algortihm for feature selection is used. Again, a cross validation building block is used as fitness evaluation. This process is very similar to the previous process. Here is the process from the "Samples" directory showing you how this looks in detail: You can also do this in a different way as long as you deliver a performance vector to the inner output port. If you double click on the selection operator, you will see the inside where you can do the performance calculation. You don't need to worry about this though since RapidMiner will automatically chose the correct direction (minimization or maximization). ![]() If it is root mean squared error, this should be minimized. This means that if you for example calculate the "accuracy" with the cross validation, this is what should be maximized. Typically you would use some validation scheme like cross validation inside of the genetic algorithm and the performance estimation delivered by the cross validation becomes the fitness function. ![]() It is the function you want to optimize for. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |