pxrd op• Data kinds: signal × signal × table → table
• Call: import fullseye as fs; fs.ledger.phase_fractions(two_theta, intensity, dictionary, background_order=4, sigma=None, lattice_tolerance=0.0, phases=None) (to call the implementation directly, import pxrd; pxrd.phase_fractions(two_theta, intensity, dictionary, background_order=4, sigma=None, lattice_tolerance=0.0, phases=None); from the registry, opsdrive.get("phase_fractions"))
Phase fractions of a mixture by non-negative least squares (NNLS) (the background is fitted simultaneously with a Chebyshev polynomial).
> The detailed description below is the original text — the summary and the headings are translated.
y ≈ Σ sₚ Rₚ(2θ) + Σ cₖ Tₖ(2θ)、sₚ >= 0、cₖ は符号自由(scipy.optimize.lsq_linear の BVLS)。体積分率 vₚ ∝ sₚ、重量分率 Wₚ ∝ sₚ ρₚ(module の docstring)。sigma を渡せば 1/σ で重みを付ける。lattice_tolerance > 0 なら相ごとに格子の倍率を 1 ± tolerance の中で黄金分割の座標降下で追い込む(参照の格子定数と試料の格子定数がずれていると、山が半分ずれた参照は倍率が下がり分率が偏る —— 罠の門を参照)。phases で辞書の一部の名前だけを使う。
返り値(dict): names・scale・volume_fraction・weight_fraction・lattice_scale・fit・ background・residual・rwp(重みつきの相対残差)・two_theta・wavelength。
Raises ValueError: 長さの不一致、辞書の格子と 2θ の不一致、背景の次数が負、未知の相の名前。
• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).
• Operator provenance and references — the sources of the research/methods this op family came from.
• The canonical algorithm (author, year) and its uses are named in the family usage guide above.
• poc_pxrd_phase_peel — py -3.11 examples/poc_pxrd_phase_peel.py
table as input)course_layout · course_occupancy · course_contains · world_build · world_camera · world_move · lidar_scan · rss_longitudinal_same
pxrd)cif_read · cubic_prototype · powder_reflections · scherrer_size · debye_ring_image · detector_two_theta · detector_calibrate · azimuthal_integrate
*Provenance: pxrd.py — DRIVE operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.