Statistical Functions on X-axis

[User (Legacy)]

I create a chart and can include statistical functions for the y-axis such 

as Analysis.Mean, Analysis.Max, etc using the statistical extensions. 

However, how do I get the Min, Max, Mean, etc for the X-axis values and 

include them in a study.

Bob

[Software FX]

All central tendency calculations are performed against the Y Values of the 

chart. X-Values are only used for the calculation correlation (two variables 

comparison).

X-Data can be obtained from: statistics.Calculators[i].DataX, this can be 

used to calculate Min and Max and to do other calculations, these 

calculations need to be performed by your code and then added as custom 

studies. For example, lets say you want to add the median in the X-Axis, the 

following code will do it:

StudyConstant medianX = new StudyConstant(StudyType.Custom,1);

double [] dataX = statistics1.Calculators[0].DataX;

Array.Sort<double>(dataX);

medianX.Value = dataX[dataX.Length / 2];

medianX.Text = "Median X";

medianX.Axis = chart1.AxisX;

medianX.Visible = true;

statistics1.Studies.Add(medianX);

-- 

Francisco Padron

www.chartfx.com

[User (Legacy)]

The software does not seem to have the DataX property in version 6.2. Can 

you please help with how to do this in .NET version 6.2?

Thanks,

Bob

"SoftwareFX Support" <noreply@softwarefx.com> wrote in message 

news:wb7ygWTyGHA.2980@webserver3.softwarefx.com...

> All central tendency calculations are performed against the Y Values of 

> the chart. X-Values are only used for the calculation correlation (two 

> variables comparison).

>

> X-Data can be obtained from: statistics.Calculators[i].DataX, this can be 

> used to calculate Min and Max and to do other calculations, these 

> calculations need to be performed by your code and then added as custom 

> studies. For example, lets say you want to add the median in the X-Axis, 

> the following code will do it:

>

> StudyConstant medianX = new StudyConstant(StudyType.Custom,1);

>

> double [] dataX = statistics1.Calculators[0].DataX;

>

> Array.Sort<double>(dataX);

>

> medianX.Value = dataX[dataX.Length / 2];

>

> medianX.Text = "Median X";

>

> medianX.Axis = chart1.AxisX;

>

> medianX.Visible = true;

>

> statistics1.Studies.Add(medianX);

>

>

> -- 

> Francisco Padron

> www.chartfx.com

>

[Software FX]

Since you didn't specify the version I assumed the latest (7.0).

In version 6.2 you are going to need to retrieve the data directly form the 

chart by using chart.XValues[i,j].

-- 

Francisco Padron

www.chartfx.com

[User (Legacy)]

I got your suggestion to work but now have another issue. The users have the 

option to plot data using the CrossTab provider and the Analysis statistics 

appear for a series whenever the series is selected by hovering over it in 

the legend. However, the Minimum X code I have just shows the same value for 

all series. How do I get the Minimum X to show up based upon the series.

The statistics are not shown until a series is selected except for the 

minimum X study I added.

The Minimum X-Value is not based upon series but is for all data. How do I 

get the study I added to work like the standard studies for each series.

[Software FX]

Most studies calculated by the Statistical extension are applied to all 

series in the chart (Y-Values) and therefore they represent multiple values, 

not just one.

The statistical extension uses chart's highlighting infrastructure to show 

the value for the highlighted series in the legend box. You can achieve a 

similar behavior by attaching to the Highlighted event in the chart. I wrote 

a little sample that demonstrates this:

private void chart1_Highlighted(object sender, 

SoftwareFX.ChartFX.Base.HighlightEventArgs e) {

    if (medianX!= null) {

        if ((e.Mode & SoftwareFX.ChartFX.Base.HighlightModes.On) != 0)

            medianX.Value = <median for series e.Series>;

        else

            medianX.Value = double.NaN;

    }

}

-- 

Francisco Padron

www.chartfx.com