1 | # -*- coding: utf-8 -*- |
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2 | ########### SVN repository information ################### |
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3 | # $Date: 2012-02-13 11:33:35 -0600 (Mon, 13 Feb 2012) $ |
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4 | # $Author: vondreele & toby $ |
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5 | # $Revision: 482 $ |
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6 | # $URL: https://subversion.xor.aps.anl.gov/pyGSAS/trunk/G2importphase.py $ |
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7 | # $Id: G2importphase.py 482 2012-02-13 17:33:35Z vondreele $ |
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8 | ########### SVN repository information ################### |
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9 | # a routine to read in powder data from a GSAS-compatible files |
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10 | # |
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11 | import sys |
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12 | import os.path as ospath |
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13 | import numpy as np |
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14 | import GSASIIIO as G2IO |
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15 | |
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16 | class GSAS_ReaderClass(G2IO.ImportPowderData): |
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17 | 'Routines to import powder data from a GSAS files' |
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18 | def __init__(self): |
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19 | super(self.__class__,self).__init__( # fancy way to self-reference |
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20 | extensionlist=('.fxye','.raw','.gsas','.gsa','.RAW','.GSAS','.GSA'), |
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21 | strictExtension=False, |
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22 | formatName = 'GSAS', |
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23 | longFormatName = 'GSAS powder data files' |
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24 | ) |
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25 | |
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26 | # Validate the contents -- look for a bank line |
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27 | def ContentsValidator(self, filepointer): |
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28 | #print 'ContentsValidator: '+self.formatName |
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29 | for i,line in enumerate(filepointer): |
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30 | if i==0: # first line is always a comment |
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31 | continue |
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32 | if i==1 and line[:4].lower() == 'inst' and ':' in line: |
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33 | # 2nd line is optional instrument parameter file |
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34 | continue |
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35 | if line[0] == '#': continue |
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36 | if line[:4] == 'BANK': |
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37 | return True |
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38 | else: |
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39 | print 'ContentsValidator: '+self.formatName |
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40 | print 'Unexpected information in line:',i+1 # debug info |
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41 | print line |
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42 | return False |
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43 | return False # no bank records |
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44 | |
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45 | def Reader(self,filename,filepointer, ParentFrame=None, **kwarg): |
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46 | x = [] |
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47 | y = [] |
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48 | w = [] |
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49 | Banks = [] |
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50 | Pos = [] |
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51 | rdbuffer = kwarg.get('buffer') |
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52 | title = '' |
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53 | comments = None |
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54 | selections = None |
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55 | |
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56 | # reload previously saved values |
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57 | if self.repeat and rdbuffer is not None: |
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58 | Banks = rdbuffer.get('Banks') |
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59 | Pos = rdbuffer.get('Pos') |
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60 | selections = rdbuffer.get('selections') |
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61 | comments = rdbuffer.get('comments') |
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62 | |
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63 | # read through the file and find the beginning of each bank |
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64 | # Save the offset (Pos), BANK line (Banks), comments for each |
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65 | # bank |
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66 | if len(Banks) != len(Pos) or len(Banks) == 0: |
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67 | try: |
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68 | i = -1 |
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69 | while True: |
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70 | i += 1 |
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71 | S = filepointer.readline() |
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72 | if len(S) == 0: break |
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73 | |
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74 | if i==0: # first line is always a comment |
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75 | title = S[:-1] |
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76 | comments = [[title,]] |
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77 | continue |
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78 | if i==1 and S[:4].lower() == 'inst' and ':' in S: |
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79 | # 2nd line is instrument parameter file (optional) |
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80 | self.instparm = S.split(':')[1].strip() |
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81 | continue |
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82 | if S[0] == '#': # allow comments anywhere in the file |
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83 | # comments in fact should only preceed BANK lines |
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84 | comments[-1].append(S[:-1]) |
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85 | continue #ignore comments, if any |
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86 | if S[:4] == 'BANK': |
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87 | comments.append([title,]) |
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88 | Banks.append(S) |
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89 | Pos.append(filepointer.tell()) |
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90 | except Exception as detail: |
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91 | print self.formatName+' scan error:'+str(detail) # for testing |
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92 | import traceback |
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93 | traceback.print_exc(file=sys.stdout) |
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94 | return False |
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95 | |
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96 | # Now select the bank to read |
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97 | if not Banks: # use of ContentsValidator should prevent this error |
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98 | print self.formatName+' scan error: no BANK records' |
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99 | selblk = None # no block to choose |
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100 | return False |
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101 | elif len(Banks) == 1: # only one Bank, don't ask |
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102 | selblk = 0 |
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103 | elif self.repeat and selections is not None: |
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104 | # we were called to repeat the read |
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105 | print 'debug: repeat #',self.repeatcount,'selection',selections[self.repeatcount] |
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106 | selblk = selections[self.repeatcount] |
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107 | self.repeatcount += 1 |
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108 | if self.repeatcount >= len(selections): self.repeat = False |
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109 | else: # choose from options |
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110 | selections = self.MultipleBlockSelector( |
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111 | Banks, |
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112 | ParentFrame=ParentFrame, |
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113 | title='Select Bank(s) to read from the list below', |
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114 | size=(600,100), |
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115 | header='Dataset Selector') |
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116 | if len(selections) == 0: return False |
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117 | selblk = selections[0] # select first in list |
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118 | if len(selections) > 1: # prepare to loop through again |
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119 | self.repeat = True |
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120 | self.repeatcount = 1 |
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121 | if rdbuffer is not None: |
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122 | rdbuffer['Banks'] = Banks |
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123 | rdbuffer['Pos'] = Pos |
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124 | rdbuffer['selections'] = selections |
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125 | rdbuffer['comments'] = comments |
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126 | |
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127 | # got a selection, now read it |
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128 | Bank = Banks[selblk] |
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129 | try: |
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130 | if 'FXYE' in Bank: |
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131 | self.powderdata = GetFXYEdata(filepointer, |
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132 | Pos[selblk],Banks[selblk]) |
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133 | elif 'FXY' in Bank: |
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134 | self.powderdata = GetFXYdata(filepointer, |
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135 | Pos[selblk],Banks[selblk]) |
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136 | elif 'ESD' in Bank: |
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137 | self.powderdata = GetESDdata(filepointer, |
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138 | Pos[selblk],Banks[selblk]) |
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139 | elif 'STD' in Bank: |
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140 | self.powderdata = GetSTDdata(filepointer, |
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141 | Pos[selblk],Banks[selblk]) |
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142 | else: |
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143 | self.powderdata = GetSTDdata(filepointer, |
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144 | Pos[selblk],Banks[selblk]) |
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145 | except Exception as detail: |
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146 | print self.formatName+' read error:'+str(detail) # for testing |
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147 | import traceback |
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148 | traceback.print_exc(file=sys.stdout) |
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149 | return False |
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150 | if comments is not None: |
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151 | self.comments = comments[selblk] |
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152 | self.powderentry[0] = filename |
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153 | self.powderentry[1] = Pos # position offset (never used, I hope) |
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154 | self.powderentry[2] = selblk+1 # bank number |
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155 | self.idstring = ospath.basename(filename) + ' Bank '+str(selblk+1) |
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156 | self.numbanks=len(Banks) |
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157 | # scan comments for temperature |
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158 | Temperature = 300 |
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159 | for S in self.comments: |
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160 | if 'Temp' in S.split('=')[0]: |
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161 | try: |
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162 | Temperature = float(S.split('=')[1]) |
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163 | except: |
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164 | pass |
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165 | self.Sample['Temperature'] = Temperature |
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166 | return True |
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167 | |
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168 | def GetFXYEdata(File,Pos,Bank): |
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169 | File.seek(Pos) |
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170 | x = [] |
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171 | y = [] |
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172 | w = [] |
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173 | S = File.readline() |
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174 | while S and S[:4] != 'BANK': |
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175 | vals = S.split() |
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176 | x.append(float(vals[0])/100.) #CW: from centidegrees to degrees |
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177 | f = float(vals[1]) |
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178 | if f <= 0.0: |
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179 | y.append(0.0) |
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180 | w.append(1.0) |
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181 | else: |
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182 | y.append(float(vals[1])) |
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183 | w.append(1.0/float(vals[2])**2) |
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184 | S = File.readline() |
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185 | N = len(x) |
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186 | return [np.array(x),np.array(y),np.array(w),np.zeros(N),np.zeros(N),np.zeros(N)] |
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187 | |
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188 | def GetFXYdata(File,Pos,Bank): |
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189 | File.seek(Pos) |
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190 | x = [] |
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191 | y = [] |
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192 | w = [] |
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193 | S = File.readline() |
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194 | while S and S[:4] != 'BANK': |
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195 | vals = S.split() |
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196 | x.append(float(vals[0])/100.) #CW: from centidegrees to degrees |
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197 | f = float(vals[1]) |
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198 | if f > 0.0: |
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199 | y.append(f) |
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200 | w.append(1.0/f) |
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201 | else: |
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202 | y.append(0.0) |
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203 | w.append(1.0) |
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204 | S = File.readline() |
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205 | N = len(x) |
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206 | return [np.array(x),np.array(y),np.array(w),np.zeros(N),np.zeros(N),np.zeros(N)] |
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207 | |
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208 | def GetESDdata(File,Pos,Bank): |
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209 | File.seek(Pos) |
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210 | cons = Bank.split() |
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211 | start = float(cons[5])/100.0 #CW: from centidegrees to degrees |
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212 | step = float(cons[6])/100.0 |
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213 | x = [] |
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214 | y = [] |
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215 | w = [] |
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216 | S = File.readline() |
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217 | j = 0 |
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218 | while S and S[:4] != 'BANK': |
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219 | for i in range(0,80,16): |
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220 | xi = start+step*j |
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221 | yi = sfloat(S[i:i+8]) |
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222 | ei = sfloat(S[i+8:i+16]) |
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223 | x.append(xi) |
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224 | if yi > 0.0: |
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225 | y.append(yi) |
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226 | w.append(1.0/ei**2) |
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227 | else: |
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228 | y.append(0.0) |
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229 | w.append(1.0) |
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230 | j += 1 |
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231 | S = File.readline() |
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232 | N = len(x) |
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233 | return [np.array(x),np.array(y),np.array(w),np.zeros(N),np.zeros(N),np.zeros(N)] |
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234 | |
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235 | def GetSTDdata(File,Pos,Bank): |
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236 | File.seek(Pos) |
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237 | cons = Bank.split() |
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238 | Nch = int(cons[2]) |
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239 | start = float(cons[5])/100.0 #CW: from centidegrees to degrees |
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240 | step = float(cons[6])/100.0 |
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241 | x = [] |
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242 | y = [] |
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243 | w = [] |
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244 | S = File.readline() |
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245 | j = 0 |
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246 | while S and S[:4] != 'BANK': |
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247 | for i in range(0,80,8): |
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248 | xi = start+step*j |
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249 | ni = max(sint(S[i:i+2]),1) |
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250 | yi = max(sfloat(S[i+2:i+8]),0.0) |
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251 | if yi: |
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252 | vi = yi/ni |
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253 | else: |
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254 | yi = 0.0 |
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255 | vi = 1.0 |
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256 | j += 1 |
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257 | if j < Nch: |
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258 | x.append(xi) |
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259 | y.append(yi) |
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260 | w.append(1.0/vi) |
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261 | S = File.readline() |
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262 | N = len(x) |
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263 | return [np.array(x),np.array(y),np.array(w),np.zeros(N),np.zeros(N),np.zeros(N)] |
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264 | |
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265 | def sfloat(S): |
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266 | 'convert a string to a float, treating an all-blank string as zero' |
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267 | if S.strip(): |
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268 | return float(S) |
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269 | else: |
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270 | return 0.0 |
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271 | |
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272 | def sint(S): |
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273 | 'convert a string to an integer, treating an all-blank string as zero' |
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274 | if S.strip(): |
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275 | return int(S) |
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276 | else: |
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277 | return 0 |
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