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annotate notes.txt @ 58:adeb9575b273

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add inverted rel pointers back to referencing from referenced
author Henry S. Thompson <ht@markup.co.uk>
date Thu, 01 Jun 2017 17:21:45 +0100
parents 05cf88c20cc5
children 823ac978f4ab
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05cf88c20cc5 sample I/O pair, with range annotations
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1
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2 Tokenisation patterns, derived from parse.py, derived from
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3 https://sites.google.com/site/e90e50/random-topics/tool-for-parsing-formulas-in-excel
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4 and
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5 parser_formule_with_textbox_v01_2003.xla
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6 linked to therein
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7
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8 1 ("[^"]*") q
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9 A text (delimited by double quotes)
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10 2 (\{[^}]+}) m
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11 A constant matrix
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12 3 (,) c
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13 A list (function parameter) separator
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14 4 ([^=\-+*/();:,.$&lt;>^!]+(?:\.[^=\-+*/();:,.$&lt;>^!]+)*\() f
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15 A function name followed by an opening parenthesis
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16 5 ([)]) p
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17 A closing parenthesis
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18 6 (^=|\() l
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19 The beginning of the formula or an opening
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20 parenthesis (not part of a function)
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21 7 ((?:(?:'[^']+')|(?:\[[0-9]+\][^!]*)|(?:[a-zA-Z_][a-zA-Z0-9._]*)!)) n
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22 A sheet name (either delimited by single quotes, or
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23 bracketed number plus optional string,
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24 or simple name (syntax is a _guess_))
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25 8 (\$?[A-Z]+\$?[0-9]+) s or r
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26 A cell reference
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27 9 ([a-zA-Z_\\][a-zA-Z0-9._]*) v
39
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28 A name (boolean constant or a variable -- anything else?)
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29 10 (.) x
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30 Single characters not matched by the previous patterns
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31 ----------
3
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32 You can't depend on
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33 <f si="..." t="shared"/>
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34 That is, it's _true_, but you can have a table with shared formulae
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35 that doesn't use it. Compare M17:T28 (see below, uses shared) and
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36 C17:J28 (mostly no shared) in sample4
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37
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38 Looks like the result of a sweep-and-copy-{right,down} results in the
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39 _new_ cells covered showing as 'shared':
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40
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41 [ ][1][1][1][1]...
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42 [2][2][2][2][2]...
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43 [2][2][2][2][2]...
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44 ...
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45
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46 Presumably that one was right-then-down, down-then-right would give a
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47 slightly different pattern
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48 --------
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49 Thinking about a pipeline...
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50 1) convert all variable references into (verbose!) elts:
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51 <!ELEMENT R EMPTY>
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52 <!ATTLIST R
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53 ac CDATA IMPLIED
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54 rc CDATA IMPLIED
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55 ar CDATA IMPLIED
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56 rr CDATA IMPLIED>
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57
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58 where e.g. ac is 'absolute column'
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59 'D6' --> <R rc='D' rr='6'/>
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60 and
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61 '$E5' --> <R ac='E' rr='5'/>
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62 No, in fact -- absolute vs. 'variable' isn't relevant for our purposes.
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63 What we probably _do_ want is to add to every reference a _relative_
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64 version, i.e. +/-columnDelta, +/-rowDelta
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65 --------
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66 Identifying dates is . . . tedious. They will be ints or floats (?),
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67 with s="<int>", where the int is a 0-origin index into the list of
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68 <xf...numFmtId="<bin>".../>
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69 children of <cellXfs> in styles.xml, and bin is a built-in date format
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70 code, see 18.8.30 numFmt (Number Format) in ISO/IEC 29500-1:2016(E) ==
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71 C071691e.pdf DONE
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72 ---------
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73 Decided to distinguish between type (num, date, str, err, ...) and
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74 class (cur(rency), others to come?). If non-standard code, just record
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75 that.
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76 The current pipe has two main steps, followed by an optional
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77 prettifying step:
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78 format.xsl (extracts type={bool,date,num,str,err}
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79 class={cur,[nothing else yet]}
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80 code={raw format code if not recognised}
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81 rect.xsl (fills in gaps, cuts down size, using only bdnse for
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82 <t>[ype] with attrs c[lass]={c,...} and [co]d[e]=...
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83 For now, just using first letters of type, class DONE
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84 ----------
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85 Hmm, looking at real data (kenneth_lay__19506), I see _lots_ of cells
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86 with (numerical) formats, but no content. Where do I throw those
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87 away? Can throw away empty _rows_ in rect.xsl, but for _cells_ have
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88 to wait for ascii.xsl or html.xsl. But only copy type in in rect if
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89 there was content before. DONE
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90 -----------
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91 Using attributes to hold space-separated lists is risky, as in
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92 refs.xsl output, is risky! Fixed, see below.
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93 -----------
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94 Not handling variables as references FIXED. Not catching external
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95 references to variables FIXED (as externals). Not catching naked [n]! as external
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96 references FIXED
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97 Solo local vars are recursively dereferenced
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98 The definition table is in workbook.xml definedNames/definedName[@name=$name]/.
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99 Sheet name to filename mapping for locals is in workbook.xml
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100 sheets/sheet[@name=$sname]/@sheetId
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101 These appear in definedName, single-quoted if (iff?) the sheet name has spaces
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102 (or other specials?)
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103 ??? Variables on l or r of ranges are just looked up: if they are complex
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104 no recursion is done: the _semantics_ of this case are not clear to
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105 me, need a real-life example...
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106 Variables whose value is itself a range are not being handled FIXED
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107 -----------
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108 Switch to default namespace in order to reduce size and improve
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109 readability, and to elements instead of attributes DONE
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110 -----------
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111 Should put another step after refs.xsl to compute a map from
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112 distinct-values of all targets to all the cells which use them
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113 DONE.
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114 Now provides inverted rel. ref info so that static input columns can
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115 be identified from their users.
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116
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117 Likewise ranges -- range endpoints in place, @@ what about the things themselves?
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118
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119 That really does mean we should move to elts for
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120 each ref or range, since at this point we want to compute vector
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121 representation as well DONE, so we can identify projections
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122
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123 Slightly irritating that we'll have to serialise this as XML and then
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124 re-build it later...
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125 -----------
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126 Overgenerating in kenneth_lay__19506: e.g. <e:ref c="E9" er="[1]!'.SPX' '.SPX'!"/>
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127 from <f>[1]!'.SPX'</f>
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128 Hmm. This cell displays in Excel as REUTERS|IDN!.SPX
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129 The indirections work as follows:
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130 in workbook.xml:
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131 <externalReferences>
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132 <externalReference r:id="rId3"/>
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133 <externalReference r:id="rId4"/>
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134 </externalReferences>
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135 in _rels/workbook.xml.rels
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136 <Relationship Id="rId3" Target="externalLinks/externalLink1.xml" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/externalLink"/>
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137 in externalLinks/externalLink1.xml
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138 <ddeLink ddeService="REUTER" ddeTopic="IDN"...
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139 <ddeItems>
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140 ...
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141 <ddeItem advise="1" name=".SPX">
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142 <values>
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143 <value>
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144 <val>1264.96</val>
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145 </value>
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146 </values>
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147 </ddeItem>
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148 Whew!
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149 FIXED
23
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150 ----------
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151 http://upcommons.upc.edu/bitstream/handle/2117/100584/KDIR_2016_47_CR.pdf
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152 [downloaded]
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153 uses appearance a lot. That needs to be harvested from styles.xml
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154 The kenneth_lay enron sample has _403_ numbered formats...
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155 ----------
23
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156 Tried the largest sheet from the largest .xlsx I could find:
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157 fuse1k/'benjamin_rogers__1002__NYISO Price Information version 2'.xlsx
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158 -rw-r--r-- 1 ht None 6273325 Apr 3 16:22 '../benjamin_rogers__1002__NYISO Price Information version 2.xlsx'
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159 -rw-r--r-- 1 ht None 23221149 Jan 1 1980 xl/worksheets/sheet3.xml
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160
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161 > lxcount xl/worksheets/sheet3.xml | sort -k2nr
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162 *Total* 1230217
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163 c 596032
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164 v 595876
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165 f 19201
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166 row 18985
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167 col 106
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168
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169 <dimension ref="A1:DY18985"/>
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170
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171 Blew java out of the water :-(
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172 java.lang.OutOfMemoryError: Java heap space
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173
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174 Need to try again with more memory, if I remember how...
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175
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176 The raw result is going to have 18985 x 102 == 2 million cells ==
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177 (assuming average cell size of 30 bytes and row overhead of 20 (*
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178 18985 (+ 20 (* 102 30))) 58,473,800 bytes, which is big but tolerable...
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179 ----------------
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180 sample4 html reveals several problems: mistaken content based on class
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181 bug, e.g. B4 is 'a' FIXED
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182 highlighted cells are being
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183 labelled as cur, e.g. B61 in
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184 output of format.xsl FIXED
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185 -----------
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186 Need to rethink variable handling...
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187 Is all we really need a normalised formula computation?:
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188 1) recursively replace variables;
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189 2) convert all simple refs to new CR string normal form:
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190 crnf ::= col row
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191 col ::= abs | rel
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192 row ::= abs | rel
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193 abs ::= '\xAA' xs:positiveInteger
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194 rel ::= '\xAE' ( ( '-' xs:positiveInteger ) | xs:nonNegativeInteger )
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195 -----------
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196 Would <c c=COL [fi= [si=]]> be sufficient?
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197 fi an index into _all_ functions, si original index into explicitly
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198 shared functions -- note that the same fi may appear with multiple
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199 si, see discussion back at the top of this doc.
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200 Brute force for now -- rect sees shared table, computes CRNF
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201 Not good enough -- <f> in shared table can't be used as is, need to
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202 rebuild ref names relative to each new home. FIXED
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203 -----------
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204 Picking colours to label regions, e.g. with similar formulae:
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205 http://stackoverflow.com/questions/470690/how-to-automatically-generate-n-distinct-colors
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206 Start with just top-n, limited to 22 from Kelly
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207 #FFB300, # Vivid Yellow
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208 #803E75, # Strong Purple
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209 #FF6800, # Vivid Orange
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210 #A6BDD7, # Very Light Blue
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211 #C10020, # Vivid Red
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212 #CEA262, # Grayish Yellow
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213 #817066, # Medium Gray
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214 # The following don't work well for people with defective color vision
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215 #007D34, # Vivid Green
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216 #F6768E, # Strong Purplish Pink
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217 #00538A, # Strong Blue
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218 #FF7A5C, # Strong Yellowish Pink
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219 #53377A, # Strong Violet
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220 #FF8E00, # Vivid Orange Yellow
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221 #B32851, # Strong Purplish Red
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222 #F4C800, # Vivid Greenish Yellow
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223 #7F180D, # Strong Reddish Brown
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224 #93AA00, # Vivid Yellowish Green
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225 #593315, # Deep Yellowish Brown
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226 #F13A13, # Vivid Reddish Orange
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227 #232C16, # Dark Olive Green
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228 ------------
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229 @@ string identity, to say nothing of actual value, is lost -- fix?
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230 @@ row/column/both spans [what?]
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231 ------
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232 enron1k/kenneth_lay__19506 contains this formula:
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233
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234 <f>[1]!'.SPX'</f>
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235
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236 which crashes tokenise/rnf FIXED works now, and with
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237 <f>[1]!'AES,DIVIDEND' (where _are_ these coming from???)
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238 Als, with enlarged memory, now runs on uli1/sheet1
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239
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240 Changes intended to fix this fixed a bug (?) which wasn't properly
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241 merging e.g. +3 -- no examples of larger numbers available to check
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242 with... We are now getting e.g. <x>2.509+0.482+0.238</x>
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243 in enron1k/kenneth_lay__19506
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244
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245 We could _either_ add a class of operators, or a class of numbers?
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246
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247 ==============
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248 Python : sys.version_info(major=2, minor=7, micro=13, releaselevel='final', serial=0)
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249 lxml.etree : (3, 6, 4, 0)
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250 libxml used : (2, 9, 2)
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251 libxml compiled : (2, 9, 2)
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252 libxslt used : (1, 1, 29)
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253 libxslt compiled : (1, 1, 29)
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254
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255 testa works
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256 ----------
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257 Python : sys.version_info(major=2, minor=7, micro=13, releaselevel='final', serial=0)
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258 lxml.etree : (3, 7, 3, 0)
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259 libxml used : (2, 9, 2)
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260 libxml compiled : (2, 9, 2)
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261 libxslt used : (1, 1, 29)
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262 libxslt compiled : (1, 1, 29)
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263
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264 testa works
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265 ---------
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266 Python : sys.version_info(major=2, minor=7, micro=13, releaselevel='final', serial=0)
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267 lxml.etree : (3, 7, 3, 0)
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268 libxml used : (2, 9, 4)
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269 libxml compiled : (2, 9, 4)
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270 libxslt used : (1, 1, 29)
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271 libxslt compiled : (1, 1, 29)
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272
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273 testa fails
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274 -----------
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275 Python : sys.version_info(major=2, minor=7, micro=13, releaselevel='final', serial=0)
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276 lxml.etree : (3, 7, 3, 0)
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277 libxml used : (2, 9, 3)
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278 libxml compiled : (2, 9, 3)
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279 libxslt used : (1, 1, 29)
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Henry S. Thompson <ht@markup.co.uk>
parents: 54
diff changeset
280 libxslt compiled : (1, 1, 29)
05cf88c20cc5 sample I/O pair, with range annotations
Henry S. Thompson <ht@markup.co.uk>
parents: 54
diff changeset
281
05cf88c20cc5 sample I/O pair, with range annotations
Henry S. Thompson <ht@markup.co.uk>
parents: 54
diff changeset
282 testa works