Find Corresponding Interpolate Value in SfChart with Spline Type

[Xamarin Hunter]

I've created SfChart as a spline type. I have two root arrays which have double type elements; the first one is X array and the next one is Y array. The element of each X array corresponds to an element of Y array. Like at below. These arrays contain more than ten float or int values.

double [] X = …

double [] Y = …

I want to find an interpolation value belong to spline with any method. It can be linear, non-linear, regression, cubic or more complex; not matter. 
I need the specific points between the X-Y data values which I used. I have known only the Y value of these points, but I can’t find the corresponding X value.
For example, Y=2 then X=? or X=5 then Y=?
I want to find interpolated value or shown on spline as a mouse tooltip. Is there any way to solve this?

 

[Muneesh Kumar G]

Hi Utemar, 

 

Greetings from Syncfusion,  

 

We have analyzed your requirement and you can achieve this by overriding TooltipTemplate in SplineSeries as per the below code snippet.  

 

Code snippet 

 

<chart:SplineSeries XBindingPath="XValue" YBindingPath="YValue" MouseMove="SplineSeries_MouseMove" 

                             ItemsSource="{Binding Data}" ShowTooltip="True"> 

                <chart:SplineSeries.TooltipTemplate> 

                    <DataTemplate> 

                        <TextBlock > 

                            <Run Text="Q1 : "/> 

                            <Run Text="{Binding Q1}"/> 

                        </TextBlock> 

                    </DataTemplate> 

                </chart:SplineSeries.TooltipTemplate> 

            </chart:SplineSeries> 

 

 

Each SplineSegment have two intermediate points Q1 and Q2. You can get these values in series mouse move as per the below code snippet.  

 

Code snippet 

 

private void SplineSeries_MouseMove(object sender, MouseEventArgs e) 

        { 

            if(e.OriginalSource is Path ) 

            { 

                SplineSegment segment = (e.OriginalSource as Path).Tag as SplineSegment; 

 

                var q1 = segment.Q1; 

                var q2 = segment.Q2; 

            } 

        } 

 

 

We have prepared a sample based on this, please find the sample from the following location.  

 

Sample: https://www.syncfusion.com/downloads/support/forum/145564/ze/WPF_Sample125782110 

 

Please let us know if you have any other queries.  

   

Regards,   

Muneesh Kumar G.