Line chart - possible to have an unbroken line through NULL values?

Question

Hi,
I have a line chart. In the middle of my data are a few missing (NULL) values.
Right now, if there is a null value in the data set, the line is broken. Is it possible to have the line connect through these null values without breaking?
I appreciate your help.
Here is an example:
###### DATASET (note the null value on 7/15)
<DATA>
<MY_ROW>
<DT>2009-07-13T00:00:00.000+00:00</DT>
<VAL>5</VAL>
</MY_ROW>
<MY_ROW>
<DT>2009-07-14T00:00:00.000+00:00</DT>
<VAL>10</VAL>
</MY_ROW>
<MY_ROW>
<DT>2009-07-15T00:00:00.000+00:00</DT>
<VAL/>
</MY_ROW>
<MY_ROW>
<DT>2009-07-16T00:00:00.000+00:00</DT>
<VAL>10</VAL>
</MY_ROW>
<MY_ROW>
<DT>2009-07-17T00:00:00.000+00:00</DT>
<VAL>15</VAL>
</MY_ROW>
<MY_ROW>
<DT>2009-07-18T00:00:00.000+00:00</DT>
<VAL>10</VAL>
</MY_ROW>
</DATA>
###### CHART CODE:
<Graph graphType="LINE_VERT_ABS">
<LegendArea visible="false" />
<Title text="" visible="true" horizontalAlignment="CENTER" />
<LocalGridData colCount="{count(xdoxslt:group(.//MY_ROW, 'DT'))}"
rowCount="1">
<ColLabels>
<xsl:for-each-group xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
select=".//MY_ROW" group-by="DT">
<xsl:sort select="current-group()/DT" />
<Label>
<xsl:value-of select="current-group()/DT" />
</Label>
</xsl:for-each-group>
</ColLabels>
<DataValues>
<RowData>
<xsl:for-each-group xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
select=".//MY_ROW" group-by="DT">
<xsl:sort select="current-group()/DT" />
<Cell>
<xsl:value-of select="sum(current-group()/VAL)" />
</Cell>
</xsl:for-each-group>
</RowData>
</DataValues>
</LocalGridData>
</Graph>
I would prefer that the line connect the two adjacent values - 7/14 and 7/16.
Thanks!
- Matt

Answer 1

Hi Matt,
Use this.
But if you don't want to display the date which has null value, we can do that too.
chart:
<Graph depthAngle="50" depthRadius="8" pieDepth="30" pieTilt="20" seriesEffect="SE_AUTO_GRADIENT" graphType="LINE_VERT_ABS">
<LegendArea visible="true" />
<LocalGridData colCount="{count(xdoxslt:group(.//MY_ROW,  'DT'))}" rowCount="1">
<RowLabels><Label>VAL</Label>
</RowLabels><ColLabels>
<xsl:for-each-group select=".//MY_ROW" group-by="DT" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:sort select="current-group()/DT" /><Label><xsl:value-of select="current-group()/DT" />
</Label>
</xsl:for-each-group></ColLabels>
<DataValues>
<RowData>
<xsl:value-of select="xdoxslt:set_variable($_XDOCTX,'prev_group', number(0))"/>
<xsl:for-each-group select=".//MY_ROW" group-by="DT" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:sort select="current-group()/DT" /><Cell>
<xsl:variable name="curr_group" select="sum(current-group()/VAL)"/>
<xsl:choose>
        <xsl:when test="$curr_group > 0">
          <xsl:value-of select="$curr_group"/>
        </xsl:when>
        <xsl:otherwise>
      <xsl:value-of select="xdoxslt:get_variable($_XDOCTX,'prev_group')"/>
        </xsl:otherwise>
      </xsl:choose></Cell>
      <xsl:value-of select="xdoxslt:set_variable($_XDOCTX,'prev_group', sum(current-group()/VAL))"/>
</xsl:for-each-group></RowData></DataValues></LocalGridData></Graph>