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Is it possible to specify your own distance function using scikit-learn K-Means Clustering?
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from scipy.sparse import issparse # $scipy/sparse/csr.py
__date__ = "2011-11-17 Nov denis"
# X sparse, any cdist metric: real app ?
# centres get dense rapidly, metrics in high dim hit distance whiteout
# vs unsupervised / semi-supervised svm
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Is SHA-1 secure for password storage?
Conclusion: SHA-1 is as safe as anything against preimage attacks, however it is easy to compute, which means it is easier to mount a bruteforce or dictionary attack. (The same is true for successors like SHA-256.) Depending on the circumstances, a hash function which was designed to be computation...
How to avoid overflow in expr. A * B - C * D
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How can I ensure that a division of integers is always rounded up?
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UPDATE: This question was the subject of my blog in January 2013. Thanks for the great question!
Getting integer arithmetic correct is hard. As has been demonstrated amply thus far, the moment you try to do a "clever" trick, odds are good that you've made a mistake. And when a flaw ...
Storing integer values as constants in Enum manner in java [duplicate]
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Well, you can't quite do it that way. PAGE.SIGN_CREATE will never return 1; it will return PA...
Insert an element at a specific index in a list and return the updated list
...ou can do b = a[:index] + [obj] + a[index:].
However, another way is:
a = [1, 2, 4]
b = a[:]
b.insert(2, 3)
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Error in : object of type 'closure' is not subsettable
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In general this error message means that you have tried to use indexing on a function. You ca...
Looking for a good world map generation algorithm [closed]
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passing several arguments to FUN of lapply (and others *apply)
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If you look up the help page, one of the arguments to lapply is the mysterious .... When we lo...
git rebase without changing commit timestamps
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Update June 2014: David Fraser mentions in the comments a solution also detailed in "Change ti...