Hi James,

I'm not sure why you use named templates, can't you just say

<xsl:value-of select="sum(a/b/data)"/> ?

That would give you the sum of all <data> records,
but indeed returns NaN if one of them is empty.

To solve this, you can narrow your selection to those
<data> elements whose content is not empty:

<xsl:value-of select="sum(a/b/data[.!=''])"/> or
<xsl:value-of select="sum(a/b/data[text()])"/>

That should return "8" for your input

HTH
Anton Triest


James Steven wrote:
>

> Hello
> To add a column of numbers I am using the xsl below.  However if there is
> one value missing in the column then the xsl produces NaN.
>
> eg. Below is xml with a value missing in last <data>.  I then use the xsl
> below to add all <data> values but receive NaN because of the missing value.
> If all <data> tags have value then the sum works.  Please could anyone show
> how to resolve this.  Any help greatly appreciated.
>
> <a>
>   <b>
> <data>1</data>
>   </b>
>   <b>
>       <data>2</data>
>   </b>
>   <b>
>       <data>5</data>
>   </b>
>   <b>
>       <data></data>
>   </b>
> </a>
>
>
> <xsl:template name="orderlist.sum.edit">
> <xsl:param name="set-of-order"/>
> <xsl:variable name="sumorg">
>   <xsl:call-template name="orderlist.sum">
>       <xsl:with-param name="set-of-order" select="$set-of-order"/>
>   </xsl:call-template>
>   </xsl:variable>
> <xsl:value-of select='format-number($sumorg, "####,###,##0.00")'/>
> </xsl:template>
>
> <xsl:template name="orderlist.sum">
> <xsl:param name="set-of-order"/>
> <xsl:choose>
>   <xsl:when test="$set-of-order">
>   <xsl:variable name="first">
>   <xsl:apply-templates select="$set-of-order[1]/data"/>
>   </xsl:variable>
>   <xsl:variable name="rest">
>   <xsl:call-template name="orderlist.sum">
>   <xsl:with-param name="set-of-order" select="$set-of-order[position()
> != 1]"/>
>   </xsl:call-template>
>   </xsl:variable>
>   <xsl:value-of select="$first + $rest"/>
>   </xsl:when>
>   <xsl:otherwise>0</xsl:otherwise>
>   </xsl:choose>
>   </xsl:template>