Icon

04 Advanced Machine Learning - Solution

Advanced Machine Learning - Exercise (Solution)

This workflow shows a solution to 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 Read AB_NYC_2019dataPredict priceR2 and error metricsControlnr of modelsMinimize MAPE InteractiveData Cleaning CSV Reader Random Forest Learner(Regression) Random Forest Predictor(Regression) Numeric Scorer Parameter OptimizationLoop Start ParameterOptimization Loop End Partitioning Replace 0 price byneighborhood average Table Columnto Variable 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 Read AB_NYC_2019dataPredict priceR2 and error metricsControlnr of modelsMinimize MAPEInteractiveData Cleaning CSV Reader Random Forest Learner(Regression) Random Forest Predictor(Regression) Numeric Scorer Parameter OptimizationLoop Start ParameterOptimization Loop End Partitioning Replace 0 price byneighborhood average Table Columnto Variable

Nodes

Extensions

Links

Download

To use this workflow in KNIME, download it from the below URL and open it in KNIME:

Download Workflow
Created by: Maarit Laukkanen
Created at: 2020-10-27
On NodePit since: 2023-09-25
Last update: 2024-11-04
Created with KNIME version: v4.6.1
Tags: parameter optimizationrandom forestmachine learningregressioneducation

Deploy, schedule, execute, and monitor your KNIME workflows locally, in the cloud or on-premises – with our brand new NodePit Runner.

Try NodePit Runner!