1 | # -*- coding: utf-8 -*- |
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2 | ########### SVN repository information ################### |
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3 | # $Date: 2018-12-07 22:03:37 +0000 (Fri, 07 Dec 2018) $ |
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4 | # $Author: toby $ |
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5 | # $Revision: 3757 $ |
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6 | # $URL: trunk/imports/G2pwd_xye.py $ |
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7 | # $Id: G2pwd_xye.py 3757 2018-12-07 22:03:37Z toby $ |
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8 | ########### SVN repository information ################### |
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9 | ''' |
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10 | *Module G2pwd_xye: Topas .xye data* |
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11 | ------------------------------------ |
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12 | |
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13 | Routine to read in powder data from a Topas-compatible .xye file |
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14 | |
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15 | ''' |
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16 | |
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17 | from __future__ import division, print_function |
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18 | import os.path as ospath |
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19 | import numpy as np |
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20 | import GSASIIobj as G2obj |
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21 | import GSASIIpath |
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22 | |
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23 | asind = lambda x: 180.*np.arcsin(x)/np.pi |
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24 | |
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25 | GSASIIpath.SetVersionNumber("$Revision: 3757 $") |
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26 | class xye_ReaderClass(G2obj.ImportPowderData): |
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27 | 'Routines to import powder data from a .xye/.chi file' |
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28 | def __init__(self): |
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29 | super(self.__class__,self).__init__( # fancy way to self-reference |
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30 | extensionlist=('.xye','.chi','.qchi',), |
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31 | strictExtension=False, |
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32 | formatName = 'Topas xye or 2th Fit2D chi', |
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33 | longFormatName = 'Topas .xye or 2th Fit2D .chi/.qchi powder data file' |
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34 | ) |
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35 | self.scriptable = True |
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36 | |
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37 | # Validate the contents -- make sure we only have valid lines |
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38 | def ContentsValidator(self, filename): |
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39 | 'Look through the file for expected types of lines in a valid Topas file' |
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40 | gotCcomment = False |
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41 | begin = True |
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42 | self.GSAS = False |
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43 | self.Chi = False |
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44 | Qchi = False |
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45 | self.Wave = None |
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46 | fp = open(filename,'r') |
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47 | if '.chi' in filename: |
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48 | self.Chi = True |
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49 | if '.qchi' in filename: |
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50 | Qchi = True |
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51 | if2theta = False |
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52 | ifQ = False |
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53 | for i,S in enumerate(fp): |
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54 | if not S: |
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55 | break |
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56 | if i > 1000: break |
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57 | if begin: |
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58 | if self.Chi or Qchi: |
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59 | if i < 4: |
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60 | if '2-theta' in S.lower(): |
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61 | if2theta = True |
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62 | elif 'q ' in S.lower(): |
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63 | ifQ = True |
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64 | wave = '' |
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65 | wave = S.split()[1:] |
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66 | if wave: |
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67 | try: |
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68 | self.Wave = float(wave[0]) |
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69 | except: |
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70 | pass |
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71 | if not self.Wave: |
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72 | self.errors = 'No wavelength in a Q chi file' |
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73 | fp.close() |
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74 | return False |
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75 | continue |
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76 | else: |
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77 | begin = False |
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78 | else: |
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79 | if2theta = True |
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80 | if i == 0 and 'xydata' in S.lower(): |
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81 | continue # fullprof header |
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82 | if gotCcomment and S.find('*/') > -1: |
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83 | begin = False |
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84 | continue |
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85 | if S.strip().startswith('/*'): |
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86 | gotCcomment = True |
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87 | continue |
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88 | if S[0] in ["'",'#','!']: |
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89 | continue #ignore comments, if any |
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90 | elif S.startswith('TITLE'): |
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91 | continue |
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92 | else: |
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93 | begin = False |
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94 | # valid line to read? |
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95 | #vals = S.split() |
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96 | if ifQ: |
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97 | pass |
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98 | elif not if2theta: |
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99 | self.errors = 'Not a 2-theta chi file' |
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100 | fp.close() |
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101 | return False |
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102 | vals = S.replace(',',' ').replace(';',' ').split() |
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103 | if len(vals) == 2 or len(vals) == 3: |
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104 | continue |
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105 | else: |
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106 | self.errors = 'Unexpected information in line: '+str(i+1) |
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107 | if all([ord(c) < 128 and ord(c) != 0 for c in str(S)]): # show only if ASCII |
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108 | self.errors += ' '+str(S) |
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109 | else: |
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110 | self.errors += ' (binary)' |
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111 | fp.close() |
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112 | return False |
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113 | fp.close() |
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114 | return True # no errors encountered |
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115 | |
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116 | def Reader(self,filename, ParentFrame=None, **unused): |
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117 | 'Read a Topas file' |
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118 | x = [] |
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119 | y = [] |
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120 | w = [] |
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121 | gotCcomment = False |
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122 | begin = True |
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123 | fp = open(filename,'r') |
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124 | for i,S in enumerate(fp): |
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125 | self.errors = 'Error reading line: '+str(i+1) |
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126 | # or a block of comments delimited by /* and */ |
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127 | # or (GSAS style) each line can begin with '#' |
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128 | # or WinPLOTR style, a '!' |
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129 | if begin: |
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130 | if self.Chi or self.Wave: |
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131 | if i < 4: |
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132 | continue |
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133 | else: |
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134 | begin = False |
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135 | else: |
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136 | if gotCcomment and S.find('*/') > -1: |
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137 | self.comments.append(S[:-1]) |
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138 | begin = False |
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139 | continue |
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140 | if S.strip().startswith('/*'): |
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141 | self.comments.append(S[:-1]) |
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142 | gotCcomment = True |
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143 | continue |
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144 | if S[0] in ["'",'#','!']: |
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145 | self.comments.append(S[:-1]) |
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146 | continue #ignore comments, if any |
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147 | elif i == 0 and 'xydata' in S.lower(): |
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148 | continue # fullprof header |
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149 | elif S.startswith('TITLE'): |
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150 | self.comments = [S] |
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151 | continue |
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152 | else: |
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153 | begin = False |
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154 | # valid line to read |
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155 | #vals = S.split() |
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156 | vals = S.replace(',',' ').replace(';',' ').split() |
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157 | if len(vals) < 2: |
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158 | print ('Line '+str(i+1)+' cannot be read:\n\t'+S) |
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159 | continue |
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160 | try: |
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161 | if self.Wave: |
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162 | try: |
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163 | val = min(0.995,self.Wave/(4.*np.pi/float(vals[0]))) #set max at 168deg |
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164 | x.append(2.0*asind(val)) |
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165 | except: |
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166 | msg = 'Error converting '+str(vals[0] |
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167 | ) + 'with wavelength ' + str(self.Wave) |
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168 | break |
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169 | else: |
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170 | x.append(float(vals[0])) |
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171 | f = float(vals[1]) |
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172 | if f <= 0.0: |
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173 | y.append(0.0) |
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174 | w.append(0.0) |
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175 | elif len(vals) == 3: |
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176 | y.append(float(vals[1])) |
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177 | w.append(1.0/float(vals[2])**2) |
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178 | else: |
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179 | y.append(float(vals[1])) |
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180 | w.append(1.0/float(vals[1])) |
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181 | except ValueError: |
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182 | msg = 'Error parsing number in line '+str(i+1) |
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183 | if GSASIIpath.GetConfigValue('debug'): |
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184 | print (msg) |
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185 | print (S.strip()) |
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186 | break |
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187 | except: |
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188 | msg = 'Error in line '+str(i+1) |
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189 | if GSASIIpath.GetConfigValue('debug'): |
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190 | print (msg) |
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191 | print (S.strip()) |
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192 | break |
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193 | N = len(x) |
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194 | self.powderdata = [ |
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195 | np.array(x), # x-axis values |
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196 | np.array(y), # powder pattern intensities |
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197 | np.array(w), # 1/sig(intensity)^2 values (weights) |
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198 | np.zeros(N), # calc. intensities (zero) |
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199 | np.zeros(N), # calc. background (zero) |
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200 | np.zeros(N), # obs-calc profiles |
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201 | ] |
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202 | self.powderentry[0] = filename |
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203 | #self.powderentry[1] = pos # bank offset (N/A here) |
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204 | #self.powderentry[2] = 1 # xye file only has one bank |
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205 | self.idstring = ospath.basename(filename) |
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206 | # scan comments for temperature |
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207 | Temperature = 300 |
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208 | for S in self.comments: |
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209 | if 'temp' in S.lower().split('=')[0]: |
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210 | try: |
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211 | Temperature = float(S.split('=')[1]) |
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212 | except: |
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213 | pass |
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214 | self.Sample['Temperature'] = Temperature |
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215 | fp.close() |
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216 | return True |
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