Answers.Body: <p>No, the model parameters are fixed. The ROC curve only considers varying the classification threshold for the fixed model.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-10-15T02:35:38.233Z
Answers.LastActivityDate: 2024-10-15T02:35:38.233Z
Answers.UserDisplayName: Sycorax
Body: <p>Is the following correct?</p>
  <p>A given ROC curve is for a family of a probabilistic classifiers under
  different threshold values. As the threshold value changes, the model
  parameters change as well and hence different points on ROC curve represents a family
  of classifiers with different mathematical parameters (model parameters) other than threshold parameter.</p>
  <p><a href="https://i.sstatic.net/A2syvYa8.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/A2syvYa8.png" alt="enter image description here" /></a></p>
  
Tags: <machine-learning><classification>
Title: Does a given ROC curve represent a family of classifiers with the same form but with different "model parameters" other than threshold parameter?
UserDisplayName: DSPinfinity
ThreadText: # Does a given ROC curve represent a family of classifiers with the same form but with different "model parameters" other than threshold parameter?
  
  (Asked by: username_0 on 2024-10-15)
  
  Is the following correct?
  
  A given ROC curve is for a family of a probabilistic classifiers under
  different threshold values. As the threshold value changes, the model
  parameters change as well and hence different points on ROC curve represents a family
  of classifiers with different mathematical parameters (model parameters) other than threshold parameter.
  
  [![enter image description here](https://i.sstatic.net/A2syvYa8.png)](https://i.sstatic.net/A2syvYa8.png)
  
  **Tags:** machine-learning, classification
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2024-10-15. Score: 3
  
  No, the model parameters are fixed. The ROC curve only considers varying the classification threshold for the fixed model.
  
  
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