Pre loader

Calculate value for y by x with SCISplineMountainRenderableSeries

Welcome to the SciChart Forums!

  • Please read our Question Asking Guidelines for how to format a good question
  • Some reputation is required to post answers. Get up-voted to avoid the spam filter!
  • We welcome community answers and upvotes. Every Q&A improves SciChart for everyone

WPF Forums | JavaScript Forums | Android Forums | iOS Forums

0
1

Good day!
I need to determine the value of the visible graph y from the x value and the problem is that I can’t calculate the y value outside of the data I’m rendering
example data:
[
{ x:1, y: 10 },
{ x:5, y: -5 },
{ x: 9, y: 15}
]

I use SCISplineMountainRenderableSeries and I need to show the intersection of the graph at point 3.5
I need a point but I have only one coordinate value

how can i get this y value?

Version
3.1.1.5312
Images
  • You must to post comments
0
0

Hi, there.

You can use one of our modifiers, SCICursorModifier, SCIRolloverModifier or SCITooltipModifier and set its property “useInterpolation” to true, like this:

let cursor = SCICursorModifier()
cursor.useInterpolation = true

And you will get the Y-Point like on the screenshot.

You can find more about Modifiers API here:

Let us know if it works for you.

Images
  • Sergey Evdokimov
    All of this modifiers works only with user interaction like touch, cursor, but i need a static not interaction solution
  • You must to post comments
0
0

You can perform hit-test programmatically and get Y-Value, like this:

        // create SCIHitTestInfo which will hold hit-test info
        let info = SCIHitTestInfo()

        // Get a coordinate from your X-Point, alternatively pass exact location
        let xCoord = xBottomAxis.currentCoordinateCalculator.getCoordinate(1.8)

        // perform hit-test
        rSeries.verticalSliceHitTest(info, at: CGPoint(x: CGFloat(xCoord), y: 0.0))

        // create series info object which will hold values, you are interested in
        let seriesInfo = rSeries.seriesInfoProvider.seriesInfo

        // update seriesInfo with hit-test info
        seriesInfo.update(info, interpolate: true)

        // get the Y-Value
        print((seriesInfo as? SCISplineXySeriesInfo)?.yValue)

You can find more about Hit-Test API here:

Let us know if it works for you

  • You must to post comments
Showing 2 results
Your Answer

Please first to submit.

Try SciChart Today

Start a trial and discover why we are the choice
of demanding developers worldwide

Start TrialCase Studies