Changeset cbd37a7 in sasmodels for sasmodels/models/bessel.py

Timestamp:

Mar 18, 2016 2:10:44 AM (9 years ago)

Author:

Paul Kienzle <pkienzle@…>

Branches:

master, core_shell_microgels, costrafo411, magnetic_model, release_v0.94, release_v0.95, ticket-1257-vesicle-product, ticket_1156, ticket_1265_superball, ticket_822_more_unit_tests

Children:

c094758

Parents:

c515b1b

Message:

compare cephes bessel function against multiprecision math

File:

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

sasmodels/models/bessel.py

@@ -67 +67 @@
 #Bessel
 parameters = [
+    ["ignored", "", 0.0, [-inf, inf], "", "no parameterless functions"],
              ]
 
-source = ["lib/polevl.c", "lib/j1d.c"]
+source = ["lib/polevl.c", "lib/j1_cephes.c"]
 
 # No volume normalization despite having a volume parameter
@@ -77 +78 @@
 
 Iq = """
-    return j1(q);
+    return 2.0*j1(q)/q;
     """