New answers tagged feature-selection
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For feature selection, do we use Chi-squared with Mutual Information together?
Usually feature selection is done with mutual information, correlation or conditional entropy. I'm not aware of statistical tests like chi square used for this, especially because the goal is usually ...
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How To Develop Cluster Models Where the Clusters Occur Along Subsets of Dimensions in Multidimensional Data?
The essential thing you are doing wrong is the selected number of clusters.
You have chosen 6 when you defined in your dataset 3.
So by simply changing to this:
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How To Develop Cluster Models Where the Clusters Occur Along Subsets of Dimensions in Multidimensional Data?
The field of feature selection for clustering studies this topic.
A specific algorithm for feature selection for clustering is Spectral Feature Selection (SPEC) which estimates the feature relevance ...
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How To Develop Cluster Models Where the Clusters Occur Along Subsets of Dimensions in Multidimensional Data?
Firstly, embrace the fact that clustering is unsupervised. Supervise learning algorithms can do feature selection because they know what they look for: features that are relevant to target. This is ...
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Feature selection before or after scaling and splitting
Some feature selection methods will depend on the scale of the data, in which case it seems best to scale beforehand. Other methods won't depend on the scale, in which case it doesn't matter.
All ...
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VIF Vs Mutual Info
There is not an optimal answear to this question, however let me shade some lights on how I have previously used these methods.
I work with large amount of features and with different type of models. ...
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do feature selection and model selection must share the same ratio between development set and test set?
Feature selection has nothing to do with a model. It is just finding a candidate list of related (or even unrelated) features that might be in a model, so it this put there is no rule that says it ...
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do feature selection and model selection must share the same ratio between development set and test set?
If my understanding is right, You have selected some set of features using any of the feature selection technique and going to train(develop) the model.
Now you want to know is like whether i have to ...
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