#scree — Public Fediverse posts

This track, fresh bread, by #Scree, is one of the most delightfully playful instrumental tracks I heard in a long while.

On #bandcamp: https://screeband.bandcamp.com/track/fresh-bread

#indieMusic #music #arabicMusic

This week I am in Iceland. This the Kambhorn (650m) on the Stokksnes peninsular in the SE. There's apparently a path down the scree from the ridge to the beach but it looks rather steep!

#Iceland #scree #volcanoes #blacksand

Some methods to determine the number of components or clusters in PCA or k-means clustering: https://thomasgladwin.substack.com/p/finding-the-true-number-of-components/. These at least work in the limit of ideal simulated data.

The basic rationale is to use random split-half data to identify what's "true" versus sampling error. Scores are based on similarities between eigenvectors or cluster centres, rather than, e.g., the shape of the eigenvalue plot.

#machineLearning #clustering #kmeans #PCA #scree #python