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MDS with n different than 2 in Orange3

In Orange 2 it was possible to perform MDS and project data onto multidimensional space rather than a plane when using the scripting library as documented in the docs.

How to do that in Orange 3? Is the feature still supported as I cannot find the MDS projection class in the data mining library, just in the visual programming part?

Solution

  • The following should work (set the number of desired components with n_components):

    import Orange

data = Orange.data.Table("iris")
mds = Orange.projection.MDS(n_components=3)
projection = mds(data)
print(projection.embedding_[:5])

    Orange3 borrows this functionality from sklearn.