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Summing XML data that is in two arrays

Tags:

arrays

xml

xslt

xpath

addition

I am very new to XSL and XML and have, I hope, an easy question. I have an XML file that has two arrays of numbers in them that I need to sum. Here is part of the XML file

<?xml version="1.0" encoding="UTF-8"?>
<out_xml>
<Root>
    <ItemCollection>
        <Item name="BaseLineOffSet" type="2">
            <Histogram>
                <DispOrder>This is Order</DispOrder>
                <IntensityArray>
                    <Intensity>105.84667205810547</Intensity>
                    <Intensity>105.83854675292969</Intensity>
                    <Intensity>105.57729339599609</Intensity>
                    <Intensity>105.66104888916016</Intensity>
                    <Intensity>105.56392669677734</Intensity>
                    <Intensity>105.33917236328125</Intensity>
                    <Intensity>105.33854675292969</Intensity>
                    <Intensity>105.31544494628906</Intensity>
                    <Intensity>105.40036010742187</Intensity>
                    <Intensity>105.21470642089844</Intensity>
                    <Intensity>105.14356994628906</Intensity>
                    <Intensity>104.92792510986328</Intensity>
                    <Intensity>104.93791961669922</Intensity>
                    <Intensity>104.93979644775391</Intensity>
                    <Intensity>104.96470642089844</Intensity>
                    <Intensity>105.01107025146484</Intensity>
                    <Intensity>104.76479339599609</Intensity>
                    <Intensity>104.9085693359375</Intensity>
                    <Intensity>104.70166778564453</Intensity>
                    <Intensity>104.75499725341797</Intensity>
                    <Intensity>104.77352905273437</Intensity>
                    <Intensity>104.77714538574219</Intensity>
                    <Intensity>104.59485626220703</Intensity>
                    <Intensity>104.73235321044922</Intensity>
                    <Intensity>104.35479736328125</Intensity>
                    <Intensity>104.56911468505859</Intensity>
                    <Intensity>104.38999938964844</Intensity>
                    <Intensity>104.30992889404297</Intensity>
                    <Intensity>104.37964630126953</Intensity>
                </IntensityArray>
            </Histogram>
        </Item>
        <Item name="DispIntervalsMaxValues" type="2">
            <Histogram>
                <DispOrder>This is Order</DispOrder>
                <IntensityArray>
                    <Intensity>1.0229243040084839</Intensity>
                    <Intensity>48.868541717529297</Intensity>
                    <Intensity>47.504795074462891</Intensity>
                    <Intensity>162.17105102539062</Intensity>
                    <Intensity>91.323570251464844</Intensity>
                    <Intensity>44.405426025390625</Intensity>
                    <Intensity>51.243541717529297</Intensity>
                    <Intensity>131.44705200195312</Intensity>
                    <Intensity>2.8496425151824951</Intensity>
                    <Intensity>21.435295104980469</Intensity>
                    <Intensity>47.006423950195312</Intensity>
                    <Intensity>0.72917240858078003</Intensity>
                    <Intensity>46.669178009033203</Intensity>
                    <Intensity>83.804801940917969</Intensity>
                    <Intensity>44.197799682617187</Intensity>
                    <Intensity>32.138923645019531</Intensity>
                    <Intensity>30.30479621887207</Intensity>
                    <Intensity>58.928920745849609</Intensity>
                    <Intensity>29.930421829223633</Intensity>
                    <Intensity>38.282505035400391</Intensity>
                    <Intensity>30.801467895507813</Intensity>
                    <Intensity>43.710361480712891</Intensity>
                    <Intensity>38.167644500732422</Intensity>
                    <Intensity>27.842643737792969</Intensity>
                    <Intensity>34.102294921875</Intensity>
                    <Intensity>61.118381500244141</Intensity>
                    <Intensity>10.910002708435059</Intensity>
                    <Intensity>3.6150767803192139</Intensity>
                    <Intensity>3.1703603267669678</Intensity>
                </IntensityArray>
            </Histogram>
        </Item>
    </ItemCollection>
</Root>
</out_xml>

What I really want is the sum of the the elements from the two Intensity arrays to be added up. So it would be something like this:

FirstArray[0]+SecondArray[0]=sum[0] which is really

105.84667205810547 + 1.0229243040084839=106.8696 and

FirstArray[1]+SecondArray[1] =sum[1]

105.83854675292969+ 48.868541717529297=154.7071 and so on ...

There are a few other Items in between these two that I need to ignore for now.

Thanks !

like image 515
user918967 Avatar asked Oct 02 '11 04:10

user918967

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2 Answers

Does the following do what you need it to?

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output omit-xml-declaration="yes" indent="yes"/>

  <xsl:template match="/">
    <root>
      <xsl:apply-templates select="//ItemCollection"/>
    </root>
  </xsl:template>

  <xsl:template match="ItemCollection">
    <xsl:variable name="itemCollection" select="." />
    <xsl:variable name="itemsCount" select="count((.//IntensityArray)[1]//Intensity)" />

    <xsl:for-each select="1 to $itemsCount">
       <xsl:variable name="itemIndex" select="." />
       <sum position="{$itemIndex}">
         <xsl:value-of select="sum($itemCollection//IntensityArray//Intensity[$itemIndex])" />
       </sum>
    </xsl:for-each>
  </xsl:template>

</xsl:stylesheet>

I got the following output when I ran it on your sample data:

<root>
   <sum position="1">106.86959636211395</sum>
   <sum position="2">154.70708847045898</sum>
   <sum position="3">153.08208847045898</sum>
   <sum position="4">267.8320999145508</sum>
   <sum position="5">196.8874969482422</sum>
   <sum position="6">149.74459838867187</sum>
   <sum position="7">156.58208847045898</sum>
   <sum position="8">236.7624969482422</sum>
   <sum position="9">108.25000262260437</sum>
   <sum position="10">126.6500015258789</sum>
   <sum position="11">152.14999389648437</sum>
   <sum position="12">105.65709751844406</sum>
   <sum position="13">151.60709762573242</sum>
   <sum position="14">188.74459838867187</sum>
   <sum position="15">149.16250610351562</sum>
   <sum position="16">137.14999389648437</sum>
   <sum position="17">135.06958961486816</sum>
   <sum position="18">163.8374900817871</sum>
   <sum position="19">134.63208961486816</sum>
   <sum position="20">143.03750228881836</sum>
   <sum position="21">135.5749969482422</sum>
   <sum position="22">148.48750686645508</sum>
   <sum position="23">142.76250076293945</sum>
   <sum position="24">132.5749969482422</sum>
   <sum position="25">138.45709228515625</sum>
   <sum position="26">165.68749618530273</sum>
   <sum position="27">115.3000020980835</sum>
   <sum position="28">107.92500567436218</sum>
   <sum position="29">107.5500066280365</sum>
</root>
like image 50
Luke Woodward Avatar answered Oct 07 '22 23:10

Luke Woodward

Updated:

Look at sum function, e.g.:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output omit-xml-declaration="yes" indent="yes"/>

  <xsl:key name="k" match="Intensity" use="count(preceding-sibling::Intensity)"/>

  <xsl:template match="/">
    <root>
      <xsl:apply-templates select="//Intensity[generate-id(.) = 
                           generate-id(key('k', count(preceding-sibling::Intensity)))]"/>
    </root>
  </xsl:template>

  <xsl:template match="Intensity">
    <sum>
      <xsl:value-of select="sum(key('k', count(preceding-sibling::Intensity)))"/>
    </sum>
  </xsl:template>

</xsl:stylesheet>

This template sums Intensity elements for both IntensityArray.

Output:

<root>
  <sum>106.86959636211395</sum>
  <sum>154.70708847045898</sum>
  <sum>153.08208847045898</sum>
  <sum>267.8320999145508</sum>
  <sum>196.8874969482422</sum>
  <sum>149.74459838867187</sum>
  <sum>156.58208847045898</sum>
  <sum>236.7624969482422</sum>
  <sum>108.25000262260437</sum>
  <sum>126.6500015258789</sum>
  <sum>152.14999389648437</sum>
  <sum>105.65709751844406</sum>
  <sum>151.60709762573242</sum>
  <sum>188.74459838867187</sum>
  <sum>149.16250610351562</sum>
  <sum>137.14999389648437</sum>
  <sum>135.06958961486816</sum>
  <sum>163.8374900817871</sum>
  <sum>134.63208961486816</sum>
  <sum>143.03750228881836</sum>
  <sum>135.5749969482422</sum>
  <sum>148.48750686645508</sum>
  <sum>142.76250076293945</sum>
  <sum>132.5749969482422</sum>
  <sum>138.45709228515625</sum>
  <sum>165.68749618530273</sum>
  <sum>115.3000020980835</sum>
  <sum>107.92500567436218</sum>
  <sum>107.5500066280365</sum>
</root>
like image 20
Kirill Polishchuk Avatar answered Oct 07 '22 23:10

Kirill Polishchuk
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