K-means: work on sparse

[mrka124]

orange3/Orange/clustering/kmeans.py

Line 29 in 1eb9b69

if len(X) <= 5000:

len(X) should be X.shape[0] beacause it raise error sparse matrix length is ambiguous; use getnnz() or shape[0] when use tf-idf sparse matrix with Kmeans

Error flow

[coco-egaliciar]

Any update for this? I have the same situation
Orange Version: 3.13

[ajdapretnar]

This was fixed in #3140. Please upgrade Orange.