Line chart x-axis label overloaded with labels

Question

Hi,
I have a Line chart filled by a large resultset (hundreds of rows). Each row contains a decimal value and a timestamp. The interval between timestamps is short so it is impossible to plot every single date/time in the x-axis label because there is no space.
I would like to hide the the x-axis label for most rows and plot this label for each x rows. Something like this:
  18/12/2009 09:00            18/12/2009 10:00           18/12/2009 11:00            18/12/2009 12:00
        |---------------------------|---------------------------|---------------------------|
In the previous x-axis example there are many timestamps between 18/12/2009 09:00 and 18/12/2009 10:00 but they are not plotted in the chart. It is possible to do something like this in MII charts?
Thank you,
Wilson Freitas
Vetta Technologies

Answer 1

Hi,
I think Michael is right about the Ticks per label parameter. Looks like it is not working for me because the chart data binding is not behaving as expected.
The chart rowset is composed by two fields: decimal and date time. The date time field is already converted to string. The rowset comes from a BLS transaction.
I think this forum has no support for file upload so I will add links to the xMII workbench screenshots so you guys can see my chart/query configuration.
This is the XACUTE Query used by the chart: http://www.vetta-group.com:8080/imgs/xacute_config.PNG
This is the Line Chart configuration:
  - Chart area:http://www.vetta-group.com:8080/imgs/chart_area.PNG
  - Data mapping: http://www.vetta-group.com:8080/imgs/data_mapping.PNG
  - X-axis: http://www.vetta-group.com:8080/imgs/xaxis.PNG
  - Y-axis: http://www.vetta-group.com:8080/imgs/yaxis.PNG
  - Server scaling:http://www.vetta-group.com:8080/imgs/server_scaling.PNG
  - Data series:http://www.vetta-group.com:8080/imgs/data_series.PNG
The chart row set is:
<?xml version="1.0" encoding="UTF-8" ?>
<Rowsets DateCreated="2010-02-02T20:50:08" EndDate="2010-02-02T20:50:07"
     StartDate="2010-02-02T19:50:07" Version="12.0.8 Build(24)">
     <Rowset>
          <Columns>
               <Column Description="" MaxRange="1" MinRange="0" Name="TAG_TIMESTAMP"
                    SQLDataType="1" SourceColumn="TAG_TIMESTAMP" />
               <Column Description="" MaxRange="1" MinRange="0" Name="TAG_VALUE"
                    SQLDataType="8" SourceColumn="TAG_VALUE" />
          </Columns>
          <Row>
               <TAG_TIMESTAMP>01/12/2009 12:00:00</TAG_TIMESTAMP>
               <TAG_VALUE>80.723414730584</TAG_VALUE>
          </Row>
          <Row>
               <TAG_TIMESTAMP>01/12/2009 12:23:59</TAG_TIMESTAMP>
               <TAG_VALUE>87.33149769706</TAG_VALUE>
          </Row>
          <Row>
               <TAG_TIMESTAMP>02/12/2009 12:47:59</TAG_TIMESTAMP>
               <TAG_VALUE>86.966843701221</TAG_VALUE>
          </Row>
          <Row>
               <TAG_TIMESTAMP>02/12/2009 01:11:59</TAG_TIMESTAMP>
               <TAG_VALUE>83.989991258174</TAG_VALUE>
          </Row>
     </Rowset>
</Rowsets>
When I run the chart I get this result: http://www.vetta-group.com:8080/imgs/chart1.PNG
As you can see the chart has no X-Axis labels ans I need to add the date/time to the X-axis. If I add the field to "X-Axis label columns" the field values are ploted but the parameter "Ticks per label" is ignored and hundreds of labels are ploted together and is impossible to read them. I think the "Ticks per label" parameter only works for fields added to Labels columns (in data mapping). The problem I am facing is: when I add the date field (http://www.vetta-group.com:8080/imgs/data_mapping2.PNG) to Label columns I get an empty chart like this: http://www.vetta-group.com:8080/imgs/chart2.PNG
What am I doing wrong?
Thank you