core_shell_microgelsmagnetic_modelticket-1257-vesicle-productticket_1156ticket_1265_superballticket_822_more_unit_tests
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Last change
on this file since 5024a56 was
23df833,
checked in by Paul Kienzle <pkienzle@…>, 5 years ago
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Document direct call to Fq in user guide
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Property mode set to
100644
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File size:
691 bytes
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| 1 | """ |
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| 2 | Minimal example of calling a kernel for a specific set of q values. |
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| 3 | """ |
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| 4 | |
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| 5 | from numpy import logspace, sqrt |
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| 6 | from matplotlib import pyplot as plt |
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| 7 | from sasmodels.core import load_model |
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| 8 | from sasmodels.direct_model import call_kernel, call_Fq |
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| 9 | |
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| 10 | model = load_model('cylinder') |
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| 11 | q = logspace(-3, -1, 200) |
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| 12 | kernel = model.make_kernel([q]) |
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| 13 | pars = {'radius': 200, 'radius_pd': 0.1, 'scale': 2} |
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| 14 | Iq = call_kernel(kernel, pars) |
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| 15 | F, Fsq, Reff, V, Vratio = call_Fq(kernel, pars) |
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| 16 | plt.loglog(q, Iq, label='2 I(q)') |
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| 17 | plt.loglog(q, F**2/V, label='<F(q)>^2/V') |
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| 18 | plt.loglog(q, Fsq/V, label='<F^2(q)>/V') |
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| 19 | plt.xlabel('q (1/A)') |
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| 20 | plt.ylabel('I(q) (1/cm)') |
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| 21 | plt.title('Cylinder with radius 200.') |
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| 22 | plt.legend() |
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| 23 | plt.show() |
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