sedumipy.sddir

Port of sddir.m: direction decomposition for the Ye-Todd-Mizuno self- dual embedding, given the Lsd factorization from sdfactor.py.

Functions

sddir(L, Lden, Lsd, pv, d, v, vfrm, At, DAt, ...)

[dx,dy,dz,dy0,err] = sddir(...): p = pv is the direction p=dx+dz. pMode selects how pv/dy0 are derived: 1 = spectral values w.r.t. vfrm (pv is reframed via frameit); 2 = affine scaling (pv=-v ignored, dy0=-y0); 3 = pv used directly (dy0 = v'*pv/R.b0).