Re: [xsl] Calculate the average line length within variable name="lines" as="element()*" not including the last line

[Alex Muir <alex.g.muir@xxxxxxxxx>]

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@xxxxxxxxx> 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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