Re: Calculate the average line length within variable

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Subject: Re: Calculate the average line length within variable name="lines" as="element()*" not including the last line
From: David Carlisle <davidc@xxxxxxxxx>
Date: Mon, 12 Apr 2010 11:19:26 +0100

On 12/04/2010 11:00, Alex Muir wrote:

<xsl:variable name="averageLineLength"


   select="round(avg($lines[last()]/preceding-sibling::node()/@length))"
 as="xs:double"/>

you have used an as attribute that says this mmust return one value but if $lines has less than two items $lines[last()]/preceding-sibling::node() will be empty, so avg() will get an empty sequence, and so return () so you fail the type check.

perhaps

select="(round(avg($lines[last()]/preceding-sibling::node()/@length)),0)[1]"

woul dbe what you want, returning 0 if there are no lines to average.

David

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Current Thread
Calculate the average line length within variable name="lines" as="element()" not including the last line Alex Muir - 12 Apr 2010 09:42:27 -0000 Martin Honnen - 12 Apr 2010 09:57:53 -0000 Alex Muir - 12 Apr 2010 10:00:39 -0000 David Carlisle* - 12 Apr 2010 10:19:57 -0000 <= Alex Muir - 12 Apr 2010 10:44:37 -0000 David Carlisle - 12 Apr 2010 10:51:04 -0000

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