# Changeset ca6cbc1c in sasview for src/sas/sasgui/perspectives/fitting/media/plugin.rst

Ignore:
Timestamp:
Jan 17, 2017 7:20:37 AM (6 years ago)
Branches:
master, ESS_GUI, ESS_GUI_Docs, ESS_GUI_batch_fitting, ESS_GUI_bumps_abstraction, ESS_GUI_iss1116, ESS_GUI_iss879, ESS_GUI_iss959, ESS_GUI_opencl, ESS_GUI_ordering, ESS_GUI_sync_sascalc, costrafo411, magnetic_scatt, release-4.1.1, release-4.1.2, release-4.2.2, ticket-1009, ticket-1094-headless, ticket-1242-2d-resolution, ticket-1243, ticket-1249, ticket885, unittest-saveload
Children:
ef0e644
Parents:
ae9b8bf
Message:

Updated documentation for lib functions in sasmodels. Refers to ticket 804

File:
1 edited

### Legend:

Unmodified
 rca1eaeb cube(x): $x^3$ sinc(x): sas_sinx_x(x): $\sin(x)/x$, with limit $\sin(0)/0 = 1$. powr(x, y): (link to Bessel function's code _) Si(x): sas_Si(x): Sine integral $\text{Si}(x) = \int_0^x \tfrac{\sin t}{t}\,dt$. (link to code _) sph_j1c(x): sas_3j1x_x(x): Spherical Bessel form $\text{sph_j1c}(x) = 3 j_1(x)/x = 3 (\sin(x) - x \cos(x))/x^3$, This function uses a Taylor series for small $x$ for numerical accuracy. :code:source = ["lib/sph_j1c.c", ...] (link to code _) sas_J1c(x): :code:source = ["lib/sas_3j1x_x.c", ...] (link to code _) sas_2J1x_x(x): Bessel form $\text{sas_J1c}(x) = 2 J_1(x)/x$, with a limiting value of 1 at $x=0$, where $J_1(x)$ is the Bessel function of first kind