1 | |
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2 | from sans.models.BaseComponent import BaseComponent |
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3 | import numpy, math |
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4 | import copy |
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5 | from sans.models.pluginmodel import Model1DPlugin |
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6 | from sans.models.DiamCylFunc import DiamCylFunc |
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7 | from sans.models.DiamEllipFunc import DiamEllipFunc |
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8 | class MultiplicationModel(BaseComponent): |
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9 | """ |
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10 | Use for P(Q)*S(Q); function call maut be in order of P(Q) and then S(Q). |
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11 | Perform multplication of two models. |
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12 | Contains the models parameters combined. |
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13 | """ |
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14 | def __init__(self, model1, model2 ): |
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15 | BaseComponent.__init__(self) |
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16 | |
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17 | |
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18 | ## Setting model name model description |
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19 | self.description="" |
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20 | if model1.name != "NoStructure"and model2.name != "NoStructure": |
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21 | self.name = model1.name +" * "+ model2.name |
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22 | self.description= self.name+"\n" |
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23 | self.description +="see %s description and %s description"%( model1.name, |
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24 | model2.name ) |
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25 | elif model2.name != "NoStructure": |
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26 | self.name = model2.name |
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27 | self.description= model2.description |
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28 | else : |
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29 | self.name = model1.name |
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30 | self.description= model1.description |
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31 | |
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32 | #For virial coefficients for only two P(Q) models,"CylinderModel","EllipsoidModel". SphereModel works w/o it. |
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33 | modelDiam = None |
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34 | if model1.__class__.__name__ == "CylinderModel": |
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35 | Model1DPlugin("DiamCylFunc") |
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36 | modelDiam = DiamCylFunc() |
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37 | para1 = 'radius' |
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38 | para2 = 'length' |
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39 | |
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40 | elif model1.__class__.__name__ == "EllipsoidModel": |
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41 | Model1DPlugin("DiamEllipFunc") |
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42 | modelDiam = DiamEllipFunc() |
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43 | para1 = 'radius_a' |
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44 | para2 = 'radius_b' |
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45 | |
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46 | self.modelD = modelDiam |
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47 | |
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48 | if model1.__class__.__name__ == "CylinderModel" \ |
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49 | or model1.__class__.__name__ == "EllipsoidModel": |
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50 | |
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51 | self.para1 = para1 |
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52 | self.para2 = para2 |
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53 | |
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54 | |
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55 | self.model1= model1 |
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56 | self.model2= model2 |
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57 | |
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58 | |
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59 | ## dispersion |
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60 | self._set_dispersion() |
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61 | ## Define parameters |
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62 | self._set_params() |
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63 | ## Parameter details [units, min, max] |
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64 | self._set_details() |
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65 | #list of parameter that can be fitted |
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66 | self._set_fixed_params() |
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67 | ## parameters with orientation |
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68 | for item in self.model1.orientation_params: |
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69 | self.orientation_params.append(item) |
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70 | |
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71 | for item in self.model2.orientation_params: |
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72 | if not item in self.orientation_params: |
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73 | self.orientation_params.append(item) |
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74 | |
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75 | |
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76 | def _clone(self, obj): |
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77 | """ |
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78 | Internal utility function to copy the internal |
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79 | data members to a fresh copy. |
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80 | """ |
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81 | obj.params = copy.deepcopy(self.params) |
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82 | obj.description = copy.deepcopy(self.description) |
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83 | obj.details = copy.deepcopy(self.details) |
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84 | obj.dispersion = copy.deepcopy(self.dispersion) |
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85 | obj.model1 = self.model1.clone() |
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86 | obj.model2 = self.model2.clone() |
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87 | |
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88 | return obj |
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89 | |
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90 | |
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91 | def _set_dispersion(self): |
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92 | """ |
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93 | combined the two models dispersions |
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94 | """ |
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95 | for name , value in self.model1.dispersion.iteritems(): |
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96 | self.dispersion[name]= value |
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97 | |
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98 | for name , value in self.model2.dispersion.iteritems(): |
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99 | # S(Q) has only 'radius' for dispersion. |
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100 | if not name in self.dispersion.keys()and name !='radius': |
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101 | self.dispersion[name]= value |
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102 | |
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103 | |
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104 | |
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105 | |
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106 | def _set_params(self): |
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107 | """ |
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108 | Concatenate the parameters of the two models to create |
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109 | this model parameters |
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110 | """ |
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111 | |
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112 | for name , value in self.model1.params.iteritems(): |
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113 | self.params[name]= value |
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114 | |
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115 | if self.modelD !=None: |
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116 | if name == self.para1 or name == self.para2: |
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117 | self.modelD.params[name]= value |
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118 | elif name in self.model2.getParamList() and name !='radius': |
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119 | self.model2.setParam( name, value) |
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120 | |
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121 | elif name in self.model2.getParamList(): |
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122 | self.model2.setParam(name, value) |
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123 | if self.modelD !=None: |
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124 | self.model2.setParam('radius', self.modelD.run()) |
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125 | |
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126 | for name , value in self.model2.params.iteritems(): |
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127 | if not name in self.params.keys()and name != 'radius': |
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128 | self.params[name]= value |
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129 | |
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130 | def _set_details(self): |
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131 | """ |
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132 | Concatenate details of the two models to create |
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133 | this model details |
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134 | """ |
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135 | for name ,detail in self.model1.details.iteritems(): |
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136 | self.details[name]= detail |
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137 | |
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138 | for name , detail in self.model2.details.iteritems(): |
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139 | if not name in self.details.keys()and name != 'radius': |
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140 | self.details[name]= detail |
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141 | |
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142 | def setParam(self, name, value): |
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143 | """ |
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144 | Set the value of a model parameter |
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145 | |
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146 | @param name: name of the parameter |
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147 | @param value: value of the parameter |
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148 | """ |
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149 | |
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150 | self._setParamHelper( name, value) |
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151 | |
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152 | if name in self.model1.getParamList(): |
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153 | self.model1.setParam( name, value) |
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154 | if self.modelD !=None: |
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155 | if name==self.para1 or name == self.para2: |
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156 | self.modelD.params[name]= value |
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157 | self.model2.setParam('radius', self.modelD.run()) |
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158 | elif name in self.model2.getParamList(): |
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159 | self.model2.setParam( name, value) |
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160 | else: |
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161 | if name in self.model2.getParamList(): |
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162 | self.model2.setParam( name, value) |
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163 | |
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164 | |
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165 | |
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166 | self._setParamHelper( name, value) |
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167 | |
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168 | def _setParamHelper(self, name, value): |
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169 | """ |
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170 | Helper function to setparam |
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171 | """ |
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172 | # Look for dispersion parameters |
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173 | toks = name.split('.') |
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174 | if len(toks)==2: |
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175 | for item in self.dispersion.keys(): |
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176 | if item.lower()==toks[0].lower(): |
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177 | for par in self.dispersion[item]: |
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178 | if par.lower() == toks[1].lower(): |
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179 | self.dispersion[item][par] = value |
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180 | return |
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181 | else: |
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182 | # Look for standard parameter |
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183 | for item in self.params.keys(): |
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184 | if item.lower()==name.lower(): |
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185 | self.params[item] = value |
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186 | return |
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187 | |
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188 | raise ValueError, "Model does not contain parameter %s" % name |
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189 | |
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190 | |
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191 | |
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192 | |
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193 | |
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194 | def _set_fixed_params(self): |
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195 | """ |
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196 | fill the self.fixed list with the two models fixed list |
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197 | """ |
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198 | for item in self.model1.fixed: |
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199 | self.fixed.append(item) |
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200 | |
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201 | for item in self.model2.fixed: |
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202 | if not item in self.fixed: |
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203 | self.fixed.append(item) |
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204 | self.fixed.sort() |
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205 | |
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206 | |
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207 | def run(self, x = 0.0): |
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208 | """ Evaluate the model |
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209 | @param x: input q-value (float or [float, float] as [r, theta]) |
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210 | @return: (DAB value) |
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211 | """ |
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212 | return self.model1.run(x)*self.model2.run(x) |
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213 | |
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214 | def runXY(self, x = 0.0): |
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215 | """ Evaluate the model |
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216 | @param x: input q-value (float or [float, float] as [qx, qy]) |
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217 | @return: DAB value |
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218 | """ |
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219 | return self.model1.runXY(x)* self.model2.runXY(x) |
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220 | |
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221 | def set_dispersion(self, parameter, dispersion): |
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222 | """ |
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223 | Set the dispersion object for a model parameter |
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224 | @param parameter: name of the parameter [string] |
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225 | @dispersion: dispersion object of type DispersionModel |
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226 | """ |
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227 | value= None |
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228 | try: |
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229 | if parameter in self.model1.dispersion.keys(): |
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230 | value= self.model1.set_dispersion(parameter, dispersion) |
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231 | #There is no dispersion for the structure factors(S(Q)). |
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232 | #ToDo: need to decide whether or not the dispersion for S(Q) has to be considered for P*S. |
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233 | elif parameter in self.model2.dispersion.keys()and name !='radius': |
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234 | value= self.model2.set_dispersion(parameter, dispersion) |
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235 | self._set_dispersion() |
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236 | return value |
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237 | except: |
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238 | raise |
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239 | |
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240 | |
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241 | |
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