Combining A Query And Data Points; Charting Multiple Data Collections - MACROMEDIA COLDFUSION MX 61-DEVELOPING COLDFUSION MX Develop Manual

The
cfchartdata
Attribute Description
value The data value to be charted. This attribute is required.
item (Optional) The description for this data point. The item appears on the horizontal axis of
bar and line charts, on the vertical axis of horizontal bar charts, and in the legend in pie
charts.

Combining a query and data points

To chart data from both query and individual data values, you specify the query name, and
related attributes, in the
tag.
cfchartdata
ColdFusion displays the chart data specified by a
for example, to the left on a bar chart. You can use the
data alphabetically long the x-axis.
One use of combining queries and data points could be if the database is missing data for one
department, you can add the information manually. The following example adds data for the
Facilities and Documentation departments to the salary data obtained from the query shown in
the previous section:
<cfchart
<cfchartseries
type="bar"
query="DataTable"
itemColumn ="Dept_Name"
valueColumn="AvgByDept"
>
<cfchartdata item="Facilities" value="35000">
<cfchartdata item="Documentation" value="725000">
</cfchartseries>
</cfchart>

Charting multiple data collections

Sometimes, you might have more than one series of data to display on a single chart, or you want
to compare two sets of data on the same chart. In some cases, you might want to use different
charting types on the same chart. For example, you might want to include a line chart on a bar
chart.
To combine multiple data series into a single chart, insert multiple
single tag. You control how the multiple data collections are charted using the
cfchart
seriesPlacement
following options:
•
default Let ColdFusion determine the best mehtod for combining the data.
•
cluster Place corresponding chart elements from each series next to each other.
•
stacked Combine the corresponding elements of each series.
•
percent Show the elements of each series as a percentage of the total of all corresponding
elements.
tag lets you specify the following information about a data point:
cfchartseries
attribute of the
cfchart
tag, and provide additional data points using the
cfchartdata
sortXAxis
tag. Using this attribute, you can specify the
tag before the data from a query;
attribute of
cfchart
tags within a
cfchartseries
Charting data
to sort
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