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Example sentences for: eigen

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The first round of clustering is initialized by defining k /3 prototype centroids (where k is the total number of clusters and 3 is the number of clustering cycles) as the most informative k /3 eigen vectors identified by PCA of the input dataset (see Materials and methods).
Nonetheless, most of the eigen vectors diverged to different gene-expression patterns within 10-15 iterations.
The inability of the method to find the expression patterns representing these groups seemed to be dependent on the overall properties of the dataset, rather than the absence of an appropriate eigen vector used to initiate the process, as the program was unable to identify these patterns even when the process was initiated by seeding the centroids with the unidentified patterns (data not shown).
The final centroids identified by the fuzzy clustering method showed little dependence on the eigen vectors used to seed the process, as evidenced by bootstrapping analysis.
Three rounds of hard k-means clustering were performed with k = 120, and each cycle was initiated by seeding k /3 centroids with the most informative k /3 eigen vectors identified by PCA, as described above.