Thanks, that could be useful however now seems my problem is counting
the number of lines accurately.
I am trying to do a count of the number lines however perhaps this is
not correct way to count the number of lines accurately in the lines
variable
<xsl:variable name="numberLines" select="count($lines)" as="xs:integer"/>
I then do a check as follows before finding AvarageLineLength but
still get the empty sequence problem.
<xsl:when test="$numberLines ge 2">
<xsl:variable name="AvarageLineLength"
select="round(avg($lines[last()]/preceding-sibling::node()/@length))"
as="xs:double"/>
<xsl:choose>
I tried the following as well with the same problem
<xsl:variable name="numberLines" select="count($lines/@length)"
as="xs:integer"/>
On Mon, Apr 12, 2010 at 10:19 AM, David Carlisle
<davidc(_at_)nag(_dot_)co(_dot_)uk> wrote:
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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