Changeset 404ebbd in sasmodels for sasmodels/models/guinier.py

Timestamp:

Jul 29, 2017 10:56:22 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:

48462b0

Parents:

a151caa

Message:

tuned random model generation for more models

File:

• sasmodels/models/guinier.py (modified) (2 diffs)

sasmodels/models/guinier.py

@@ -33 +33 @@
 description = """
  I(q) = scale.exp ( - rg^2 q^2 / 3.0 )
- 
+
     List of default parameters:
     scale = scale
@@ -49 +49 @@
 """
 
+def random():
+    import numpy as np
+    scale = 10**np.random.uniform(1, 5)
+    # Note: compare.py has rg cutoff for guinier, so use that
+    q_max = 1.0
+    rg_max = np.sqrt(90*np.log(10) + 3*np.log(scale))/q_max
+    rg = 10**np.random.uniform(0, np.log10(rg_max))
+    pars = dict(
+        #background=0,
+        scale=scale,
+        rg=rg,
+    )
+    return pars
+
 # parameters for demo
 demo = dict(scale=1.0, rg=60.0)