Question

Coldfusion graph with multiple series

Asked by: WyleOP

I was to create a bar chart that shows the number of occurrences of a date broken down by class.  My result set has three columns (Count, Date, Class)

So, I should have a series for each class type (There are multiple and not every date will have the same classes).  Based on the sample data below the chart should show:

For the first date I will only have a bar representing the "C" class with a value of 1.
For the second date I will only have a bar representing the "P" class with a value of 4.
For the third date I will have two bars, one for each class ("P", "C") with the values of 3 and 1.

CLASS 	COUNTOFDATE 	MONYEAR
C 	1 	1983-04
P 	4 	1985-06
P 	3 	1986-03
C 	1 	1986-03
                                  
1:
2:
3:
4:
5:

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Asked On
2009-10-19 at 08:37:38ID24823879
Tags

Coldfusion CFCHART

Topics

ColdFusion Application Server

,

Cold Fusion Markup Language

Participating Experts
2
Points
500
Comments
12

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Answers

 

by: pravinasarPosted on 2009-10-19 at 10:05:22ID: 25606944

 

by: WyleOPPosted on 2009-10-19 at 10:25:13ID: 25607125

I've already looked at that page, and the related MX7 and 8 pages and they do not make it clear how to achieve what I'm looking to do.

 

by: _agx_Posted on 2009-10-19 at 10:37:37ID: 25607245

You'd need to group the data differently and generate the counts based on MonYear + Class.  So your query results would be something like

ChartItem                     ChartValue
1983-04 (Class=C)       1      
1985-06 (Class=P)       4      
1986-03 (Class=P)       3      
1986-03 (Class=C)       1      

 

by: WyleOPPosted on 2009-10-19 at 10:43:57ID: 25607300

While that would work, I'd prefer to have each class represented by a different color to make the graph more readable.  I may have to build two separate queries.

 

by: _agx_Posted on 2009-10-19 at 11:27:03ID: 25607721

> I may have to build two separate queries.

That would probably be the simplest approach, and use a separate series  ie cfdataseries ...  

 

by: WyleOPPosted on 2009-10-19 at 12:25:54ID: 25608161

The problem with that is that I'd need a separate series for each class type and I don't know that until runtime.  This is a rather simple graph in Access or Excel, why would it be so difficult in ColdFusion?

Can't I produce the graph I'm looking for with the dataset that I already have?

See attached example.

 

by: _agx_Posted on 2009-10-19 at 12:58:57ID: 25608415

Well, this isn't Excel ;-) Web applications have a lot more to contend with than a simple desktop app.  

But I don't see what the problem is.. if you chart each class in a separate cfchartseries, it comes out perfectly.  If you don't want to create separate queries, you could just use a grouped cfoutput.  

<!--- MUST order by "Class" first or output will not work ! --->
<cfquery name="qChartData" ....>
SELECT  ..... FROM ....
ORDER BY Class
</cfquery>

<cfchart>
      <cfoutput query="qChartData" group="Class">
            <cfchartseries type="bar">
                  <cfoutput>
                  <cfchartdata item="#MonthYear#" value="#CountOfDate#">
                  </cfoutput>
            </cfchartseries>
      </cfoutput>
</cfchart>

 

by: WyleOPPosted on 2009-10-21 at 09:30:02ID: 25625591

Your solution got me closer, but it's still not exactly what I'm looking for.  I have two problems:

1. If there is no class data for a given MonYear, the graph assumes 1 and not 0.
2. I can show the legend, but the labels dont show for which class a given color is.

 

by: _agx_Posted on 2009-10-21 at 09:40:15ID: 25625694

Hmm, let me check. The labels are tricky because you are not actually including the class in the chart code anywhere.  IIRC, there may be a setting controling #1.  Let me see if there's one for #2

 

by: WyleOPPosted on 2009-10-21 at 09:43:06ID: 25625734

I got #2 figured out by using the following tag element.

<cfchartseries type="bar" serieslabel="#Class#">

As for #1, I found an erticle online that discusses this issue.

http://www.coldfusionjedi.com/index.cfm/2008/2/7/Ask-a-Jedi-CFCHART-Question

I'm looking it over now.

 

by: _agx_Posted on 2009-10-21 at 10:05:56ID: 25625967

> http://www.coldfusionjedi.com/index.cfm/2008/2/7/Ask-a-Jedi-CFCHART-Question

Hm, I was thinking interpolation .. but that might work better.

 

by: WyleOPPosted on 2009-10-21 at 11:33:01ID: 25626856

I got it to work by building my own resultset.  I get all the distinct dates and distinct classes and loop through each combination.  If there is no data for a specific combination, I set the count to 0.  The attached file shows the result.

<cfset dataGraphs2 = queryNew("MonYear,Class,CountOfDate")>
<cfloop query="Classes">
      <cfloop query="Dates">
            <cfquery name="dataCheck" datasource="DS">
                  SELECT Count(Date) as CountOfDate, Format([Date],'yyyy-mm') as checkDate
                  FROM data
                  WHERE [data.val] = '<cfoutput>#form.val#</cfoutput>'
                  and   Format([Date],'yyyy-mm') = <cfqueryparam cfsqltype="cf_sql_varchar" value="#Dates.checkDate#">
                  and   [Class] = <cfqueryparam cfsqltype="cf_sql_varchar"  value="#Classes.checkClass#">
                  group by Format([Date],'yyyy-mm')
            </cfquery>
            <cfif dataCheck.recordcount EQ 0>
                <cfset queryAddRow(dataGraphs2)>
                <cfset querySetCell(dataGraphs2,"MonYear", Dates.checkDate)>
                <cfset querySetCell(dataGraphs2,"Class", Classes.checkClass)>
                <cfset querySetCell(dataGraphs2,"CountOfDate", 0)>
            <cfelse>
                  <cfloop query="dataCheck">
                <cfset queryAddRow(dataGraphs2)>
                <cfset querySetCell(dataGraphs2,"MonYear", Dates.checkDate)>
                <cfset querySetCell(dataGraphs2,"Class", Classes.checkClass)>
                <cfset querySetCell(dataGraphs2,"CountOfDate", dataCheck.CountOfDate)>
                  </cfloop>
            </cfif>
      </cfloop>
</cfloop>
<!---<cfdump var="#dataGraphs2#">--->
<cfchart show3d="true"  showlegend="true"  xaxistitle="Date" yaxistitle="Count" chartwidth="650" seriesplacement="cluster" >
      <cfoutput query="dataGraphs2" group="Class">
            <cfchartseries  type="bar" serieslabel="#Class#">
                  <cfoutput>
                        <cfchartdata item="#MonYear#" value="#CountOfDate#">
                  </cfoutput>
            </cfchartseries>
      </cfoutput>
</cfchart>
                                              
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