Add a model here when you are working on it. Mark it as converted when it is tested and pushed.

The err columns are the result of running multi_compare.sh, which generates random parameters for comparison against sasview. double should be at most 5e-14 relative error, single should be 5e-5.

./multi_compare.sh MODEL 200 1d200 mono double
./multi_compare.sh MODEL 200 1d200 mono single
./multi_compare.sh MODEL 200 2d32 mono double
./multi_compare.sh MODEL 200 2d32 mono single

Some models still have issues when run using single precision (lamellarPC for example).

We are not dealing with magnetism at this point as it requires some work on the wrapper functionality. Thus the *Magnetic* column below is for reference as to which models need attention. The *SESANS* column should be used to indicate if the model is a priority (1 highest, 4 lowest). The Multiply column indicates whether the model can be multiplied by a structure factor. This is currently hardcoded into src/sas/perspectives/fitting/models.py

SasView name	sasmodels name	P(Q)	S(Q)	Multiply	Multiplicity	Magnetic	SESANS	Assigned	Converted	double err	single err	double 2D	single 2D
HayterMSAStructure	HayterMSAsq	.	Y	.	.	.	1	RKH	Y	NaNs	FAIL	-	-
BarBellModel	barbell	Y	.	.	.	.	3	AJJ	Y	good	good	FAIL	FAIL
BCCrystalModel	bcc_paracrystal	Y	.	.	.	.	3	AJJ	Y	good	FAIL	9e-14	2e-2
BroadPeakModel	broad_peak	Y	.	.	.	.	4	PDB	Y	good	good	-	-
CappedCylinderModel	capped_cylinder	Y	.	.	.	.	3	HP	Y	good	good	2e-11	3e-3
CoreShellCylinderModel	core_shell_cylinder	Y	.	Y	.	.	3	HP	Y	good	good	9e-14	4e-4
CylinderModel	cylinder	Y	.	Y	.	Y	1	HP	Y	good	good	2e-13	1e-4
DABModel	dab	Y	.	.	.	.	1	DM	Y	good	good	-	-
EllipsoidModel	ellipsoid	Y	.	Y	.	.	1	HP	Y	good*	good	3e-14	1e-4
FCCrystalModel	fcc_paracrystal	Y	.	.	.	.	3	AJJ	Y	good	FAIL	FAIL	FAIL
PeakGaussModel	gaussian_peak	Y	.	.	.	.	4	AJJ	Y	good	1e-3	-	-
GelFitModel	gel_fit	Y	.	.	.	.	1	PR	Y	good	good	-	-
Guinier	guinier	Y	.	.	.	.	1	JRK	Y	good	good	-	-
HardsphereStructure	hardsphere	.	Y	.	.	.	1	RKH	Y	good	FAIL	-	-
HollowCylinderModel	hollow_cylinder	Y	.	Y	.	.	2	JRK	Y	good	2e-3	4e-13	2e-3
LamellarModel	lamellar	Y	.	.	.	.	2	PAK	Y	good	good	-	-
LamellarPSModel	lamellarCaille	Y	.	.	.	.	3	RKH	Y	good	5e-2	-	-
LamellarPSHGModel	lamellarCailleHG	Y	.	.	.	.	3	RKH	Y	3e-12	5e-3	-	-
LamellarFFHGModel	lamellarFFHG	Y	.	.	.	.	3	RKH	Y	good	good	-	-
LamellarPCrystallModel	lamellarPC	Y	.	.	.	.	3	RKH	Y	good	FAIL	-	-
Lorentz	lorentz	Y	.	.	.	.	1	JRK	Y	good	good	-	-
MassFractalModel	mass_fractal	Y	.	.	.	.	1	PR	Y	FAIL	FAIL	-	-
MassSurfaceFractal	mass_surface_fractal	Y	.	.	.	.	1	PR	Y	good	good	-	-
ParallelepipedModel	parallelepiped	Y	.	Y	.	Y	2	MAG	Y	good	good	2e-13	8e-5
PearlNecklaceModel	pearl_necklace	Y	.	.	.	.	3	JRK	Y	fail	fail	-	-
PolyExclVolume	polymer_excl_volume	Y	.	.	.	.	3	PR	Y	good	good	-	-
!AbsolutePower_Law	power_law	Y	.	.	.	.	3	SMK	Y	good	good	-	-
SphereModel	sphere	Y	.	Y	.	Y	1	HP	Y	good*	good	-	-
StickyHSStructure	stickyhardsphere	.	Y	.	.	.	1	RKH	Y	good	FAIL	-	-
SurfaceFractalModel	surface_fractal	Y	.	.	.	.	1	PR	Y	good	5e-5	-	-
TeubnerStrey	teubner_strey	Y	.	.	.	.	1	PAK	Y	good*	good	-	-
TriaxialEllipsoidModel	triaxial_ellipsoid	Y	.	Y	.	.	3	HP	Y	good*	good	good	good
TwoLorentzian	two_lorentzian	Y	.	.	.	.	4	PR	Y	good	good	-	-
BEPolyelectrolyte		Y	.	.	.	.	3
BinaryHSModel	binary_hard_sphere	Y	.	.	.	.	1	PDB
Core2ndMomentModel		Y	.	.	.	.	3	SMK
CoreMultiShellModel		Y	.	Y	Y	Y	3
CoreShellModel		Y	.	Y	.	Y	2	MD
CoreShellEllipsoidModel		Y	.	Y	.	.	3
CoreShellEllipsoidXTModel		Y	.	Y	.	.	3
CoreShellBicelleModel		Y	.	Y	.	.	2
CorrLength		Y	.	.	.	.	3
CSParallelepipedModel		Y	.	Y	.	.	3	MAG
Debye		Y	.	.	.	.	1	SMK
EllipticalCylinderModel		Y	.	Y	.	.	3	MD
FlexibleCylinderModel		Y	.	.	.	.	2	PR
FlexCylEllipXModel		Y	.	.	.	.	3
FractalModel		Y	.	.	.	.	1	PDB
FractalCoreShell		Y	.	.	.	.	3
FuzzySphereModel		Y	.	.	.	.	2	TRN
GaussLorentzGel		Y	.	.	.	.	2
GuinierPorod		Y	.	.	.	.	2	MD
LineModel		Y	.	.	.	.	4
LinearPearlsModel		Y	.	.	.	.	3
MicelleSphCore		Y	.	Y	.	.
MultiShellModel		Y	.	Y	Y	.	3	PAK
MultiplicationModel		.	.	.	.	.		PAK
OnionExpShellModel		Y	.	Y	Y	.	3
PeakLorentzModel		Y	.	.	.	.	4	AJJ	Y	good	good	-	-
Poly_GaussCoil		Y	.	.	.	.	2	SMK
PorodModel		Y	.	.	.	.	3	MD
PringleModel		Y	.	.	.	.	3	AJJ
RaspBerryModel		Y	.	.	.	.	2	AJJ
RectangularPrismModel		Y	.	Y	.	.	2	MAG
RectangularHollowPrismModel		Y	.	Y	.	.	3	MAG
RectangularHollowPrismInfThinWallsModel		Y	.	.	.	.	3	MAG
ReflectivityModel		Y	.	.	Y	.	4
ReflectivityIIModel		Y	.	.	Y	.	4
RPA10Model		Y	.	.	Y	.	3	PAK
ReflectivityModel		Y	.	.	.	.	4
SCCrystalModel		Y	.	.	.	.	3
SphericalSLDModel		Y	.	Y	Y	.	3
SquareWellStructure		.	Y	.	.	.	1	PDB
StackedDisksModel		Y	.	Y	.	.	2	TRN
StarPolymer		Y	.	.	.	.	2	PR
TwoPowerLaw		Y	.	.	.	.	4	WP
UnifiedPowerRg		Y	.	.	Y	.	4
VesicleModel		Y	.	Y	.	.	2	PDB
testmodel							3
testmodel_2							3
sum_p1_p2							3
sum_Ap1_1_Ap2							3
polynomial5							3
sph_bessel_jn							3

^* using taylor expansion near 0 for fq = 3 (sin(qr)/qr - cos(qr))/qr²; using quad precision as a cross check, this is more accurate than computing the direct expression for qr < 0.1 in double precision, and so the values will differ from those in sasview. It is much more accurate in single precision. This affects many models, including sphere and ellipsoid models. The cylinder models are using J1(qr)/qr, which has its own numerical expansion and does not suffer from this problem. Should probably settle on one or the other and move it into the library. So even though the double precision values for sphere, ellipsoid and triaxial ellipsoid differ by more than 5e-14, they are still marked good. Similarly, the Teubner-Strey model checks out against the quad precision version and so is marked good.

1GList of standard parameters (name = meaning):

• radius = radius
• sld = scattering length density of particle
• solvent_sld = scattering length density of matrix
• cor_length = correlation length
• exp = exponent (example: porod_exp)
• peak_pos = q_peak or q0 etc
• theta, phi, psi