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04 Advanced Machine Learning

Advanced Machine Learning - Exercise

This workflow shows a hands-on exercise in the L2-DS Introduction to KNIME Analytics Platform for Data Scientists - Advanced course

Task 2: Parameter Optimization Loop1. Start with a Parameter Optimization Loop Start node. Create a parameterfor the number of trees with start value=50, end value=150, andincrement=10. It is an integer.2. Overwrite the number of models setting in the Random Forest Learner(Regression) node with this parameter3. Transform the numeric scoring metrics into flow variables. Use the TableColumn to Variable node.4. End with a Parameter Optimization Loop End node. Use MAPE as theobjective value. Task 1: Random Forest (Regression)1. Execute the workflow. It reads and preprocesses the data about Airbnblistings in New York City, NY in 2019.2. Partition the data into a training set (70%) and a test set (30%). Applyrandom sampling.3. Train a Random Forest (Regression) model to predict the price column4. Apply the model to the test set5. Evaluate the model's performance with the Numeric Scorer node Node 99Node 100control nr modelsPredict profitNode 103Error metricsNode 105Minimize MAP InteractiveData Cleaning Replace 0 price byneighborhood average CSV Reader Partitioning Parameter OptimizationLoop Start Random Forest Learner(Regression) Random Forest Predictor(Regression) Numeric Scorer Table Columnto Variable ParameterOptimization Loop End Task 2: Parameter Optimization Loop1. Start with a Parameter Optimization Loop Start node. Create a parameterfor the number of trees with start value=50, end value=150, andincrement=10. It is an integer.2. Overwrite the number of models setting in the Random Forest Learner(Regression) node with this parameter3. Transform the numeric scoring metrics into flow variables. Use the TableColumn to Variable node.4. End with a Parameter Optimization Loop End node. Use MAPE as theobjective value. Task 1: Random Forest (Regression)1. Execute the workflow. It reads and preprocesses the data about Airbnblistings in New York City, NY in 2019.2. Partition the data into a training set (70%) and a test set (30%). Applyrandom sampling.3. Train a Random Forest (Regression) model to predict the price column4. Apply the model to the test set5. Evaluate the model's performance with the Numeric Scorer node Node 99Node 100control nr modelsPredict profitNode 103Error metricsNode 105Minimize MAPInteractiveData Cleaning Replace 0 price byneighborhood average CSV Reader Partitioning Parameter OptimizationLoop Start Random Forest Learner(Regression) Random Forest Predictor(Regression) Numeric Scorer Table Columnto Variable ParameterOptimization Loop End

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Created by: Maarit Laukkanen
Created at: 2020-10-27
On NodePit since: 2023-03-11
Last update: 2024-12-23
Created with KNIME version: v4.7.0
Tags: parameter optimizationrandom forestmachine learningregressioneducation

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