Changeset 48462b0 in sasmodels for sasmodels/models/guinier.py

Timestamp:

Jul 30, 2017 11:24:42 PM (7 years ago)

Author:

Paul Kienzle <pkienzle@…>

Branches:

master, core_shell_microgels, costrafo411, magnetic_model, ticket-1257-vesicle-product, ticket_1156, ticket_1265_superball, ticket_822_more_unit_tests

Children:

109d963

Parents:

404ebbd

Message:

tuned random model generation for even more models

File:

• sasmodels/models/guinier.py (modified) (1 diff)

sasmodels/models/guinier.py

@@ -51 +51 @@
 def random():
     import numpy as np
-    scale = 10**np.random.uniform(1, 5)
-    # Note: compare.py has rg cutoff for guinier, so use that
+    scale = 10**np.random.uniform(1, 4)
+    # Note: compare.py has Rg cutoff of 1e-30 at q=1 for guinier, so use that
+    # log_10 Ae^(-(q Rg)^2/3) = log_10(A) - (q Rg)^2/ (3 ln 10) > -30
+    #   => log_10(A) > Rg^2/(3 ln 10) - 30
     q_max = 1.0
     rg_max = np.sqrt(90*np.log(10) + 3*np.log(scale))/q_max