scipy/scipy — pull request #138 by larsmans (2012-01-18 15:21:54+00:00)
Title: ENH implement sin, sqrt and tan on CSR and CSC matrices

I implemented a few more arithmetic operations on sparse matrices, so that

np.sin(X)
np.sqrt(X)

and

np.tan(X)

work when `X` is CSR or CSC.