Re: [Scikit-learn-general] Some problems about gradient boosting module

2016-04-29 Thread Paolo Losi
Hi! On Wed, Apr 27, 2016 at 2:46 PM, Li Aodong wrote: > > First, it is about the subsample parameter description. As the picture > below, it says that "Choosing subsample < 1.0 leads to *a* *reduction of > variance and an increase in bias*". But I think choosing subsample < 1.0 > actually* increa

[Scikit-learn-general] Interpreting the cluster_centers in sklearn KMEans

2016-04-29 Thread JAGANADH G
Hi , After performing clustering, the cluster centers can be extracted via .cluster_centers_. A sample result is kmeans.cluster_centers_ array([[ 1.01505989, -0.70632886], [ 0.33475124, 0.89126382], [-1.287003 , -0.43512572]]) How can *I interpret these values.* *Can somebody he

Re: [Scikit-learn-general] Interpreting the cluster_centers in sklearn KMEans

2016-04-29 Thread Sebastian Raschka
Hi, Jaganadh, it looks like you ran k-means on a 2-dimensional dataset (i.e., a dataset with 2 feature variables) and k=3. Thus, the results mean that these three cluster centers (or “centroids”) are the centers of the 3 clusters that k-means attempted to discover. Or in other words, there are