[SciPy-dev] Missing functions --> Matrix functions, generalized eigenvalue problem, iterative solvers, CWT (Continuos wavelet transform)
Nils Wagner
nwagner at mecha.uni-stuttgart.de
Wed Feb 27 11:44:25 CST 2002
Hi all,
The current output of
>>> help (linalg)
is
Linear algebra routines.
Solving Linear Systems:
inv --- Find the inverse of a square matrix
solve --- Solve a linear system of equations
det --- determinant of a matrix
pinv --- Moore-Penrose pseudo inverse (using least-squares)
pinv2 --- Moore-Penrose pseudo inverse (using SVD)
lstsq --- Least-squares solve
Matrix Factorizations:
lu --- LU decomposition
cholesky --- Cholesky factorization
qr --- QR factorization
schur --- Schur decomposition
rsf2csf --- Real to complex schur form.
norm --- vector and matrix norm
eig --- eigenvectors and eigenvalues
eigvals --- only eigenvalues
svd --- singular value decomposition
Matrix Functions
expm --- exponential (using Pade approximation)
cosm --- cosine
sinm --- sine
tanm --- tangent
coshm --- hyperbolic cosine
sinhm --- hyperbolic sine
tanhm --- hyperbolic tangent
funm --- arbitrary function
>>>
Is there any progress in implementing the matrix logarithm logm ?
Has anyone written some functions concerning the generalized eigenvalue
problem
(or even more general polynomial eigenvalue problems), that
is
A x = \lambda B x
(\lambda^n A_n + \dots + \lambda A_1 + A_0) x = 0
Are there any iterative solvers (CG, GMRES, ...) ?
Nils
I am also looking for discrete and continuous wavelet transforms.
More information about the Scipy-dev
mailing list