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"""
This is a data file used to load in sesans data and fit it using the bumps engine
"""
from bumps.names import *
import sesansfit
# Enter the model name to use
model_name = "sphere"
# DO NOT MODIFY THIS LINE
model = sesansfit.get_bumps_model(model_name)
# Enter any custom parameters
# name = Parameter(initial_value, name='name')
phi = Parameter(0.0855, name='phi')
# Add the parameters to this list that should be displayed in the fitting window
custom_params = {"phi" : phi}
# SESANS data file name
sesans_file = "spheres2micron.ses"
# Initial parameter values (if other than defaults)
# "model_parameter_name" : value
initial_vals = {
"sld" : 1.41,
"radius" : 10000,
"sld_solvent" : 2.70,
}
# Ranges for parameters if other than default
# "model_parameter_name" : [min, max]
param_range = {
"phi" : [0.001, 0.5],
"radius" : [100, 100000]
}
# Constraints
# model.param_name = f(other params)
# EXAMPLE: model.scale = model.radius*model.radius*(1 - phi) - where radius
# and scale are model functions and phi is a custom parameter
model.scale = phi*(1-phi)
# Send to the fitting engine
# DO NOT MODIFY THIS LINE
problem = sesansfit.sesans_fit(sesans_file, model, initial_vals, custom_params, param_range)
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