xamdatachart Multiple series in one chart

Kalyan posted over 13 years ago

Everyone,

I'm working on a xamdatachart that would need to chart two series (common x axis but two y axes). I'm using the following xaml code but I can't seem to figure out the background code to accomplish this.

ig:XamDataChart Grid.Row="1" HorizontalAlignment="Stretch" Name="backtestChart" VerticalAlignment="Stretch" VerticalZoomable="True" VerticalContentAlignment="Stretch" HorizontalZoomable

="True">

<ig:XamDataChart.Axes

<ig:NumericYAxis x:Name

="yAxis" />

<ig:NumericYAxis x:Name

="xmYAxis">

<!--MinimumValue="100"

MaximumValue="10000">-->

<ig:NumericYAxis.LabelSettings

<ig:AxisLabelSettings Foreground

="#FF69177C"

FontSize

="12"

HorizontalAlignment

="Center"

VerticalAlignment

="Center"

Location

="OutsideRight"

Angle="{Binding ElementName=sldYAxisAngle, Path

=Value}"

Extent="{Binding ElementName=sldYAxisExtend, Path

=Value}" />

</ig:NumericYAxis.LabelSettings

</ig:NumericYAxis

<ig:CategoryXAxis

x:Name="xAxis"

ItemsSource="{Binding}"

Label

="{}{Label}"/>

</ig:XamDataChart.Axes

<ig:XamDataChart.Series

<ig:LineSeries

x:Name="PL"

ItemsSource="{Binding}"

XAxis="{Binding ElementName=xAxis}"

YAxis="{Binding ElementName=yAxis}"

ValueMemberPath="Value" Thickness

="2" />

<ig:LineSeries

x:Name="Test"

ItemsSource="{Binding}"

XAxis="{Binding ElementName=xAxis}"

YAxis="{Binding ElementName=yAxis}"

ValueMemberPath="Value" Thickness

="2" />

<ig:FinancialPriceSeries x:Name

="PriceSeries"

DisplayType

="Candlestick"

TrendLineThickness

="12"

TrendLineType

="ModifiedAverage"

ItemsSource="{Binding

OpenMemberPath

="Open"

CloseMemberPath

="Close"

HighMemberPath

="High"

LowMemberPath

="Low"

VolumeMemberPath

="Volume"

XAxis="{Binding ElementName

=commonXAxis}"

YAxis="{Binding ElementName

=priceYAxis}">

</ig:FinancialPriceSeries

</ig:XamDataChart.Series>

So, I've got two NumericYaxes which I'm guessing would let me chart two series but I can't seem to figure out how to accomplish it. When I try to add the second series, the chart only charts the second and ignores the second series. This is the code behind:

var data = from row in backtestTable

.Rows.OfType<

DataRow>()

select new DataItem()

{

Label = (

string)row["Date"].ToString(),

Value =

double.Parse(row["Price"].ToString())

};

backtestChart.DataContext = data;

data =

from row in backtestTable

.Rows.OfType<

DataRow>()

select new DataItem()

{

Label = (

string)row["Date"].ToString(),

Value =

double.Parse(row["Sales"].ToString())

};

backtestChart.Series[

"Test"].DataContext = data;

I would really appreciate any help.

Thanks,

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Darcy posted over 13 years ago

It would be very useful if "series of all equal length and interval" was not a requirement. XY charts tend to be technical data and you may have a different sampling interval, points get thrown out, or points are not collected. To make the chart work you then have to massage your data to try to meet this requirement.

I experienced the very same thing when I first tried to use the chart and it took a while to figure out what was going on.
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Offline SSG Admin posted over 11 years ago in reply to Darcy
Sorry to revive this old thread - but I am beating my head against the wall on a similar issue.

We use these controls in a generic system, where the user can define his / her own charts using the generic data and layouts. In XamChart we had the ability to define multiple series on a chart quite happily, using completely disparate object sets per series. It seems to me that in the XamDataChart, this is not possible, as the bindings only cater for one (CategoryDateTime) X-axis, with the Y-axis values for different series coming from different properties from the SAME X-Axis DataContext?

In other words, using ChartDataPoint definitions as follows would simply not work if you have a collection of these for each series?

(simplified)

class MyDataPoint {
object XAxisValue;
object YAxisValue;
}

You CAN ONLY define multiple series on one shared CategoryDateTimeXAxis using an object that looks like this:

class YourDataPoint {
object XAxisValue;
object YAxisValueSeries1;
object YAxisValueSeries2;
...etc.
}

Please let me know what you think - and for the love of all that is sweet and beautiful, correct me if I'm wrong, or give me an example of how I can use the first object and not have to use the second?

Thank you very much!
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