Regression
Last updated
Last updated
A regression model in machine learning is a type of predictive model used to estimate the relationship between a dependent variable (target feature) and one or more independent variables. It aims to predict continuous outcomes by fitting a line or curve to the data points, minimizing the difference between observed and predicted values. To get the best possible results, we will go through the basics of the Model Scenario. In Model Scenario, you select parameters related to the dataset and model.
To run the model, you have to choose a Target Feature first. The target refers to the variable or outcome that the model aims to predict or estimate. In this case, it should be a numerical column.
You will be taken to the next step where you can choose all the Model Features you want to analyze. You can select which features the model will analyze. Graphite Note will automatically exclude some features that are not suitable for the model and will provide reasons for each exclusion.
Moving forward, you'll see a comprehensive list of preprocessing steps that Graphite Note will apply to prepare your data for training. This enhances data quality, ensuring your model produces accurate results. Typically, these steps are performed by data scientists, but with our no-code machine learning platform, Graphite Note handles it for you. After reviewing the preprocessing steps, you can finish and Run Scenario.
The training duration may vary depending on the data volume, typically ranging from 1 to 10 minutes. The training will utilize 80% of the data to train various machine learning models and the remaining 20% to test these models and calculate relevant scores. Once completed, you will receive information about the best model based on the F1 value and details about training time.
To interpret the results after running your model, go to the Performance tab. Here, you can see the overall model performance post-training. Model evaluation metrics such as F1 Score, Accuracy, AUC, Precision, and Recall are displayed to assess the performance of classification models. Details on Model metrics can also be found on Accuracy Overview tab.
On the performance tab, you can explore five different views that provide insights related to model training and results: Key Drivers, Impact Analysis, Model Fit, Training Results and Details.
Key Drivers indicate the importance of each column (feature) for the Model's predictions. The higher the reliance of the model on a feature, the more critical it is. Graphite uses permutation feature importance to determine these values.
The Impact Analysis tab allows you to select various features and analyze, using a bar chart, how changes in each feature affect the target feature. You can switch between Count and Percentage views.
The Model Fit Tab displays the performance of the trained model. It includes a stacked bar chart with percentages showing comparison between known outcomes (historical) and model predicted outcomes.
In the Training Results Tab, you will find information about all the models automatically considered during the training process. Graphite ran several machine learning algorithms suitable for multiclass classification problems, using 80% of the data for training and 20% for testing. The best model, based on the F1 score, is chosen and marked in green in the models list.
The Details tab shows the results of the predictive model, presented in a table format. Each record includes the predicted label, predicted probability, and predicted correctness, offering insights into the model's predictions, confidence, and accuracy for each data point. Dataset test results can be exported into Excel by clicking on the XLSX button in the right corner.
Once the model is trained, you can use it to predict future values, solve multi-class classification problems, and drive business decisions. Here are ways to take action with your Regression model:
In Graphite Note, you can generate Actionable Insights using the Actionable Insights Input Form. Here, you can provide specific details about your business and objectives. This data is then combined with model training results (e.g., Regression model training results) to produce a tailored analytics narrative aligned with your goals.
Actionable Insights leverage generative AI models to deliver these results. These insights are conclusions drawn from data that can be directly turned into actions or responses. You can access
Actionable Insights from the main navigation menu, provided you are subscribed to a Graphite Note plan that includes actionable insights queries.
After building and analyzing a predictive model using Graphite Note, the Predict function allows you to apply the model to new data. This enables you to forecast outcomes or target variables based on different feature combinations, providing actionable insights for decision-making.
You can share your prediction results with your team using the Notebook feature. With Notebooks, users can also run their own predictions on your Regression model.
Notebooks allow you to create various visualizations with detailed descriptions. You can plot model results for better understanding and enable users to make their own predictions. For more information, refer to the Data Storytelling section.
