Hi Juan, The fcluster function was that I needed. I can now proceed from here to classify images. Thank you very much,
Jaime On Thu, Nov 3, 2016 at 5:00 PM, Juan Nunez-Iglesias <[email protected]> wrote: > Hi Jaime, > > From *Elegant SciPy*: > > """ > The *fcluster* function takes a linkage matrix, as returned by linkage, > and a threshold, and returns cluster identities. It's difficult to know > a-priori what the threshold should be, but we can obtain the appropriate > threshold for a fixed number of clusters by checking the distances in the > linkage matrix. > > from scipy.cluster.hierarchy import fcluster > n_clusters = 3 > threshold_distance = (Z[-n_clusters, 2] + Z[-n_clusters+1, 2]) / 2 > clusters = fcluster(Z, threshold_distance, 'distance') > > """ > > As an aside, I imagine this question is better placed in the SciPy mailing > list than scikit-learn (which has its own hierarchical clustering API). > > Juan. > > On Fri, Nov 4, 2016 at 2:16 AM, Jaime Lopez Carvajal <[email protected]> > wrote: > >> Hi there, >> >> I am trying to do image classification using hierarchical clustering. >> So, I have my data, and apply this steps: >> >> from scipy.cluster.hierarchy import dendrogram, linkage >> >> data1 = np.array(data) >> Z = linkage(data, 'ward') >> dendrogram(Z, truncate_mode='lastp', p=12, show_leaf_counts=False, >> leaf_rotation=90., leaf_font_size=12.,show_contracted=True) >> plt.show() >> >> So, I can see the dendrogram with 12 clusters as I want, but I dont know >> how to use this to classify the image. >> Also, I understand that funtion cluster.hierarchy.cut_tree(Z, >> n_clusters), that cut the tree at that number of clusters, but again I dont >> know how to procedd from there. I would like to have something like: >> cluster = predict(Z, instance) >> >> Any advice or direction would be really appreciate, >> >> Thanks in advance, Jaime >> >> >> -- >> >> *Jaime Lopez Carvajal* >> >> _______________________________________________ >> scikit-learn mailing list >> [email protected] >> https://mail.python.org/mailman/listinfo/scikit-learn >> >> > > _______________________________________________ > scikit-learn mailing list > [email protected] > https://mail.python.org/mailman/listinfo/scikit-learn > > -- *Jaime Lopez Carvajal*
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