Questions

Hi team,

In my app,i’m using a custom rollover modifier as tool tip.I am representing y axis value (numerical value) in tooltip.I would like to have decimal places upto 3 digits in tooltip.do you have any suggestion to how i could achieve this. i’m attaching current screenshot along with this question.

Thanks
Vinu Gilbert

Hello,

I am currently working on an DateTimeAxis where I am trying to display the labels in two hours intervals. So far it is working well but I have noticed when working with different timezones , if the timezone is odd, the labels display only odd numbers. When the timezone is even however the labels are even as well (eg. get-4 displays labels such as 2pm 4pm 6pm 8pm while gmt-7 displays 1pm 3pm 5pm 7pm)
I have played around with hours and dates to try to dynamically adjust the min and max visible ranges depending on if the current time is even or odd but that doesn’t affect at all the labels even after providing the major deltas and range.

does anyone know how to fix this issue? I want even labels regardless of the situation.

Hello,

At right chart we have show only one X-axis which needs to update in real time .whenever new values will come we have to update in X-axis in itself instead of adding new line at X-Axis.

Each time New Y – axis will come that will append at left chart (Can be consider left chart showing history of right chart)

Let me know if anything further requred

Thanks.

Hello Friends ,

   Sync two Chart in Android Bottom chart can be change on top chart touch

We are looking a solution where we want show two chart at Top and Bottom in Android Screen.based on Top chart changed by gesture /finger touch should be expend/shrink like zoom in and out bottom chart

Assume at top chart data range has between 0 to 3,00,000 , I want to capture in bottom chart only selected/touched part in with expanded form.

I have attached below screen shot which may be helpful.

Solution can be like this but not able to get code for this implementation

https://blog.scichart.com/content/images/2021/06/Navigate-ECG-strip-with-Pocket-ECM.gif

https://blog.scichart.com/android-app-to-view-long-term-ecg-signals/

I appreciate any help regarding this issue.

Hello,

As you have already the examples of the EEG -50 channel, Is it possible to set the sensitivity factor for the channels to show the graph.
Basically, this will set the amplitude based on the frequency variation example 7micro volts/millimeter (7microvolts/mm) for each channel. Is there any way we can do it using Scichart, please let us know.

Appreciate your help

Regards,
Aditya

Hello Friends,

I'm looking a solution where i can change Y-Axis range in between (0.1,0.2,0.4,0.6,0.8,1.0) .

I appreciate any help for above question

Thanks
Vasim

When I work with the 2D Android Heatmap Chart, I want to draw a frame on the borders of the cells. Is this possible?

Thanks already for your help.

Hi

I have added 24 Line graphs for EEG. Now I want to display the name of each channels against each graph. I am using Y steeped graph which you are using for Vital signs display in example code. Can you please let me know how to t to display the name of each channels against each graph

Best Regards,
Aditya

Hi,

Can you please tell me how to show an annotation(extends at BoxAnnotation(x1, y1, 2, y2)) that starts at a certain point(x1, y1) and ends at the end of the chart. That is, the starting point (x1) is known, and the end point (x2) at the very end of the surface (graph)?
Thanks in advance.

Regards,
Batyr

Hi,

Can you please tell me how to change selection points of annotation?

Thanks in advance.

Regards,
Batyr

We are adding 24 channel data Live graph using Scichart Example of Vital sign monitor. We are using VitalSignsMonitorShowcaseFragment.java example.

To show the live graph, do we need to accumulate the data for 50 point or so. I see in the code they are accumulating?

Is it necessary for the accumulation, please let us know

protected void initExample(ExampleVitalSignsMonitorFragmentBinding binding) {
    final DefaultVitalSignsDataProvider dataProvider = new DefaultVitalSignsDataProvider(getActivity());

    setUpChart(dataProvider);

    dataProvider.getData().buffer(50, TimeUnit.MILLISECONDS).doOnNext(ecgData -> {
        if(ecgData.isEmpty()) return;

        dataBatch.updateData(ecgData);

        UpdateSuspender.using(binding.surface, () -> {
            final DoubleValues xValues = dataBatch.xValues;

            ecgDataSeries.append(xValues, dataBatch.ecgHeartRateValuesA);
            ecgSweepDataSeries.append(xValues, dataBatch.ecgHeartRateValuesB);

            bloodPressureDataSeries.append(xValues, dataBatch.bloodPressureValuesA);
            bloodPressureSweepDataSeries.append(xValues, dataBatch.bloodPressureValuesB);

            bloodOxygenationDataSeries.append(xValues, dataBatch.bloodOxygenationA);
            bloodOxygenationSweepDataSeries.append(xValues, dataBatch.bloodOxygenationB);

            bloodVolumeDataSeries.append(xValues, dataBatch.bloodVolumeValuesA);
            bloodVolumeSweepDataSeries.append(xValues, dataBatch.bloodVolumeValuesB);

            final VitalSignsData lastVitalSignsData = dataBatch.lastVitalSignsData;
            final double xValue = lastVitalSignsData.xValue;

            lastEcgSweepDataSeries.append(xValue, lastVitalSignsData.ecgHeartRate);
            lastBloodPressureDataSeries.append(xValue, lastVitalSignsData.bloodPressure);
            lastBloodOxygenationSweepDataSeries.append(xValue, lastVitalSignsData.bloodOxygenation);
            lastBloodVolumeDataSeries.append(xValue, lastVitalSignsData.bloodVolume);
        });
    }).compose(bindToLifecycle()).subscribe();

    updateIndicators(0);
    Observable.interval(0, 1, TimeUnit.SECONDS, AndroidSchedulers.mainThread())
            .doOnNext(this::updateIndicators)
            .compose(bindToLifecycle()).subscribe();
}

Hi, I’ve trying to run the charts in emulator and it works fine with recyclerview ,but when i try to render chart in a fragment it doesn’t shows.The same fragment render charts in device and issue with emulator.I’m using geny motion. Thanks in Advance

Hi,

Can you please tell me do you have tool like https://www.scichart.com/documentation/win/current/webframe.html#Fibonacci%20Retracement%20Drawing%20Tool.html
on Android?
If not, please give me a sample code on how to implement this with scichart.
Thanks in advance.

Regards,
Batyr

Hi,

I,ve added ZoomExtentsModifier(), PinchZoomModifier() to the chart modifier.I want these modifiers on Xaxis only not on YAxis.Is possible to remove these modifiers on one axis.My requirement is that, during pinchzoom yaxis value needs to be constant

Hi, I’ve been working on recyclerview with scichart.The problem i’m facing is that sometimes,when you come back from other screens the charts is not loading eventhough the other data in the list are showing.The list is placed inside a view pager .This issue is not consistant sometimes it shows the graph sometimes it won’t .The exception i’m getting are

java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child’s parent first.
at android.view.ViewGroup.addViewInner(ViewGroup.java:5260)
at android.view.ViewGroup.addView(ViewGroup.java:5089)

2021-08-17 14:50:52.639 15073-29533/com.fascilityconnex.voicemobile E/SciChart Rendering Errors: SciChartSurface has no XAxes. Please ensure SciChartSurface.XAxis is set, or SciChartSurface.XAxes has at least one axis
2021-08-17 14:50:52.641 15073-29531/com.fascilityconnex.voicemobile E/Exception: null
java.lang.UnsupportedOperationException: AxisCollection.getAxisById(‘DefaultAxisId’) returned more than one axis with the ID=DefaultAxisId. Please check you have assigned correct axis Ids when you have multiple axes in SciChart
at com.scichart.charting.model.AxisCollection.getAxisById(SourceFile:10)

I would like to add scroll listener on x axis title. Is it possible to add scroll to axis title

When I open the activity with the chart , I see a black screen. And there is no graph displayed.
I have a trial license key which is valid.

Here is my full code:
xml file:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/chart_layout"
android:orientation="vertical">

Activity:

public class ECGMonitorFragment extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    try {
        com.scichart.charting.visuals.SciChartSurface.setRuntimeLicenseKey("");
    } catch(Exception e){

        Log.e("SciChart", "Error while accesing the license", e);
    }


    setContentView(R.layout.activity_ecgmonitor_fragment);



    // Create a SciChartSurface
    final SciChartSurface surface = new SciChartSurface(this);

    // Get a layout declared in "activity_main.xml" by id
    LinearLayout chartLayout = (LinearLayout) findViewById(R.id.chart_layout);

    // Add the SciChartSurface to the layout
    chartLayout.addView(surface);

    // Initialize the SciChartBuilder
    SciChartBuilder.init(this);

    // Obtain the SciChartBuilder instance
    final SciChartBuilder sciChartBuilder = SciChartBuilder.instance();

    // Create a numeric X axis
    final IAxis xAxis = sciChartBuilder.newNumericAxis()
            .withAxisTitle("X Axis Title")
            .withVisibleRange(-5, 15)
            .build();

    // Added in Tutorial #8 - two Y axes
    // Create a numeric axis, right-aligned
    final IAxis yAxisRight = sciChartBuilder.newNumericAxis()
            .withAxisTitle("Primary")
            // Assign a unique ID to the axis
            .withAxisId("primaryYAxis")
            .withAxisAlignment(AxisAlignment.Right)
            .build();

    // Create another numeric axis, left-aligned
    final IAxis yAxisLeft = sciChartBuilder.newNumericAxis()
            .withAxisTitle("Secondary")
            // Assign a unique ID to the axis
            .withAxisId("secondaryYAxis")
            .withAxisAlignment(AxisAlignment.Left)
            .withGrowBy(0.2,0.2)
            .build();

    // Add both Y axes to the YAxes collection of the surface
    Collections.addAll(surface.getYAxes(), yAxisLeft, yAxisRight);

    // Added in Tutorial #3
    // Add a bunch of interaction modifiers to a ModifierGroup
    ModifierGroup chartModifiers = sciChartBuilder.newModifierGroup()
            // Setting MotionEventsGroup
            .withMotionEventsGroup("SharedMotionEvents").withReceiveHandledEvents(true)
            .withPinchZoomModifier().build()
            .withZoomPanModifier().withReceiveHandledEvents(true).build()
            .withZoomExtentsModifier().withReceiveHandledEvents(true).build()
            .withXAxisDragModifier().withReceiveHandledEvents(true).withDragMode(AxisDragModifierBase.AxisDragMode.Scale).withClipModeX(ClipMode.None).build()
            .withYAxisDragModifier().withReceiveHandledEvents(true).withDragMode(AxisDragModifierBase.AxisDragMode.Pan).build()
            .build();

    // Add the X axis to the XAxes collection of the surface
    Collections.addAll(surface.getXAxes(), xAxis);

    // Add the interactions to the ChartModifiers collection of the surface
    Collections.addAll(surface.getChartModifiers(), chartModifiers);

    // Added in Tutorial #6 - FIFO (scrolling) series
    // Create a couple of DataSeries for numeric (Int, Double) data
    // Set FIFO capacity to 500 on DataSeries
    final int fifoCapacity = 500;

    final XyDataSeries lineData = sciChartBuilder.newXyDataSeries(Integer.class, Double.class)
            .withFifoCapacity(fifoCapacity)
            .build();
    final XyDataSeries scatterData = sciChartBuilder.newXyDataSeries(Integer.class, Double.class)
            .withFifoCapacity(fifoCapacity)
            .build();

    // Create and configure a line series
    final IRenderableSeries lineSeries = sciChartBuilder.newLineSeries()
            .withDataSeries(lineData)
            // Register on a particular Y axis using its ID
            .withYAxisId("primaryYAxis")
            .withStrokeStyle(ColorUtil.LightBlue, 2f, true)
            .build();

    // Create an Ellipse PointMarker for the Scatter Series
    EllipsePointMarker pointMarker = sciChartBuilder
            .newPointMarker(new EllipsePointMarker())
            .withFill(ColorUtil.LightBlue)
            .withStroke(ColorUtil.Green, 2f)
            .withSize(10)
            .build();

    // Create and configure a scatter series
    final IRenderableSeries scatterSeries = sciChartBuilder.newScatterSeries()
            .withDataSeries(scatterData)
            // Register on a particular Y axis using its ID
            .withYAxisId("primaryYAxis")
            .withPointMarker(pointMarker)
            .build();

    // Add a RenderableSeries onto the SciChartSurface
    surface.getRenderableSeries().add(scatterSeries);
    surface.getRenderableSeries().add(lineSeries);
    surface.zoomExtents();

    // Added in Tutorial #5
    // Create a LegendModifier and configure a chart legend
    ModifierGroup legendModifier = sciChartBuilder.newModifierGroup()
            .withLegendModifier()
            .withOrientation(Orientation.HORIZONTAL)
            .withPosition(Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM, 10)
            .build()
            .build();

    // Add the LegendModifier to the SciChartSurface
    surface.getChartModifiers().add(legendModifier);

    // Create and configure a CursorModifier
    ModifierGroup cursorModifier = sciChartBuilder.newModifierGroup()
            // Setting MotionEventsGroup
            .withMotionEventsGroup("SharedMotionEvents").withReceiveHandledEvents(true)
            .withCursorModifier().withShowTooltip(true).build()
            .build();

    // Add the CursorModifier to the SciChartSurface
    surface.getChartModifiers().add(cursorModifier);

    // Added in Tutorial #9 - one more SciChartSurface
    final SciChartSurface surface2 = new SciChartSurface(this);

    // Add the SciChartSurface to the layout
    chartLayout.addView(surface2);

    // Set layout parameters for both surfaces
    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT, 1.0f);
    surface.setLayoutParams(layoutParams);
    surface2.setLayoutParams(layoutParams);

    // Create a numeric X axis
    final IAxis xAxis2 = sciChartBuilder.newNumericAxis()
            .withAxisTitle("X Axis Title")
            .withVisibleRange(-5, 15)
            .build();

    // Create a numeric axis
    final IAxis yAxisRight2 = sciChartBuilder.newNumericAxis()
            .withAxisTitle("Primary")
            .withAxisId("primaryYAxis")
            .withAxisAlignment(AxisAlignment.Right)
            .build();

    // Create another numeric axis
    final IAxis yAxisLeft2 = sciChartBuilder.newNumericAxis()
            .withAxisTitle("Secondary")
            .withAxisId("secondaryYAxis")
            .withAxisAlignment(AxisAlignment.Left)
            .withGrowBy(0.2, 0.2)
            .build();

    // Add the Y axis to the YAxes collection of the surface
    Collections.addAll(surface2.getYAxes(), yAxisLeft2, yAxisRight2);

    // Add the X axis to the XAxes collection of the surface
    Collections.addAll(surface2.getXAxes(), xAxis2);

    // Create and configure an area series
    final IRenderableSeries areaSeries = sciChartBuilder.newMountainSeries()
            .withDataSeries(scatterData)
            .withYAxisId("primaryYAxis")
            .withStrokeStyle(ColorUtil.LightBlue, 2f, true)
            .withAreaFillColor(ColorUtil.argb(ColorUtil.LightSteelBlue, 0.6f))
            .build();

    // Add the area series to the RenderableSeries collection of the surface
    Collections.addAll(surface2.getRenderableSeries(), areaSeries);

    // Create the second collection of chart modifiers
    ModifierGroup chartModifiers2 = sciChartBuilder.newModifierGroup()
            // Setting MotionEventsGroup
            .withMotionEventsGroup("SharedMotionEvents").withReceiveHandledEvents(true)
            .withZoomExtentsModifier().withReceiveHandledEvents(true).build()
            .withZoomPanModifier().withReceiveHandledEvents(true).build()
            .withPinchZoomModifier().withReceiveHandledEvents(true).build()
            .withCursorModifier().withReceiveHandledEvents(true).build()
            .build();

    // Add the interactions to the ChartModifiers collection of the surface
    Collections.addAll(surface2.getChartModifiers(), chartModifiers2);

    TimerTask updateDataTask = new TimerTask() {
        private int x = 0;

        @Override
        public void run() {
            UpdateSuspender.using(surface, new Runnable() {
                @Override
                public void run() {
                    lineData.append(x, Math.sin(x * 0.1));
                    scatterData.append(x, Math.cos(x * 0.1));

                    // Added in Tutorial #7
                    // Add an annotation every 100 data points
                    if(x%100 == 0) {
                        TextAnnotation marker = sciChartBuilder.newTextAnnotation()
                                // Register on a particular Y axis using its ID
                                .withYAxisId("primaryYAxis")
                                .withIsEditable(false)
                                .withText("N")
                                .withBackgroundColor(ColorUtil.Green)
                                .withX1(x)
                                .withY1(0.0)
                                .withVerticalAnchorPoint(VerticalAnchorPoint.Center)
                                .withHorizontalAnchorPoint(HorizontalAnchorPoint.Center)
                                .withFontStyle(20, ColorUtil.White)
                                .withZIndex(1)
                                .build();

                        surface.getAnnotations().add(marker);

                        // Remove one annotation from the beginning
                        // in the FIFO way
                        if(x > fifoCapacity){
                            surface.getAnnotations().remove(0);
                        }
                    }

                    // Zoom series to fit the viewport
                    surface.zoomExtents();
                    surface2.zoomExtents();
                    ++x;
                }
            });
        }
    };

    Timer timer = new Timer();

    long delay = 0;
    long interval = 10;
    timer.schedule(updateDataTask, delay, interval);

}

}

I’m trying to add custom layout to the tooltip modifier ,but i couldn’t find the solution , also i would like to change the crosshair type behavior on the tool tip ,instead of that i would like to add my own style

Hi,

I am trying to add text annotation on the chart but it doesn’t show. I’m wondering what went wrong with my code.

TextAnnotation textAnnotation = sciChartBuilder.newTextAnnotation()
                .withText("hello")
                .withX1(450)
                .withY1(1)
                .withFontStyle(20, Color.WHITE)
                .build();
        ecgSurface.getAnnotations().add(textAnnotation);

I try to make a text formatting for my chart on IOS and Android, regarding your documentation:

IOS:
https://www.scichart.com/documentation/ios/current/axis-labels—textformatting-and-cursortextformatting.html
yAxis.textFormatting = “$0.0”

Android:
https://www.scichart.com/documentation/android/current/Axis%20Labels%20-%20TextFormatting%20and%20CursorTextFormatting.html
yAxis.setTextFormatting(“$0.0000”);

I checked my code and its the same like yours. On Android i have:

// yAxis filed with type IAxis
private IAxis yAxis;

// create
yAxis = sciChartBuilder
.newNumericAxis()
.withGrowBy(0.01d, 0.1d)
.withDrawLabels(true)
.withDrawMajorGridLines(true)
.withDrawMinorGridLines(false)
.withDrawMajorBands(false)
.withDrawMajorTicks(false)
.build();

// the set textFormatting:
yAxis.setTextFormatting(“$0.0000”);

On IOS i have:

var yAxis: SCINumericAxis?
self.yAxis = SCINumericAxis()
self.yAxis?.textFormatting = “$0.0”

But it is not working, can you tell me please why? What I’m doing wrong?

Hi,

I’d like to learn how to cancel creating annotation in the OnAnnotationCreatedListener(). Thanks.

annotationCreationModifier.setAnnotationCreationListener(new OnAnnotationCreatedListener() {
        @Override
        public void onAnnotationCreated(IAnnotation iAnnotation) {
            if (outofbound) {
                 // remove current annotation
            }
         }

Hi,

I want to change the colormap so that the:
– minimum (blue) = 4095
– maximum (red) = 800

Also, I want to set 0 to either black or transparent.

I can easily change the min and max values, just wanting to change the color limit and set 0 = black.

Here is my code for creating the heatmap:

public void heatmap(){
    // Create a SciChartSurface
    SciChartSurface surface = new SciChartSurface(this);
    // Get a layout declared in "activity_main.xml" by id
    LinearLayout chartLayout = findViewById(R.id.chart_layout);
    // Add the SciChartSurface to the layout
    chartLayout.addView(surface);
    // Initialize the SciChartBuilder
    SciChartBuilder.init(this);
    // Obtain the SciChartBuilder instance
    final SciChartBuilder sciChartBuilder = SciChartBuilder.instance();
    final NumericAxis xAxis = sciChartBuilder.newNumericAxis()
            .withGrowBy(0.1, 0.1)
            .build();
    final NumericAxis yAxis = sciChartBuilder.newNumericAxis()
            .withGrowBy(0.1, 0.1)
            .build();
    final FastUniformHeatmapRenderableSeries heatmapRenderableSeries = sciChartBuilder.newUniformHeatmap()
            .withMinimum(4095)
            .withMaximum(800)
            .withCellTextStyle(sciChartBuilder.newFont().withTextSize(8).withTextColor(ColorUtil.White).build())
            .withDrawTextInCell(true)
            .withDataSeries(createDataSeries())
            .build();
    final SciChartSurface chart = surface;
    Collections.addAll(chart.getXAxes(), xAxis);
    Collections.addAll(chart.getYAxes(), yAxis);
    Collections.addAll(chart.getRenderableSeries(), heatmapRenderableSeries);
    Collections.addAll(chart.getChartModifiers(), sciChartBuilder.newModifierGroupWithDefaultModifiers().build());
}

So far what I know about Scichart is only their given examples, They are really great, what worries me now before I apply for any realtime cryptocurrency data API, I would like to know how to integrate the API to my chart so that I get real time data. If there is any example code with API recommendations I would really appreciate.

From your examples on Github all of them requires databinding which is giving me serious problems. I am running into databinding errors, would you happen to have solutions to that?

We want to create loop graph in android wrap data

Hello there. At the beginning of the program, I define the workspace as w=10 and h=10 units. I set the new workspace to 5×5 in a button event. The new workspace is created but the old 10×10 volume remains on the screen. When I create the new workspace I want the old one to disappear. Thank you in advance for your help. Good work.

My button event.

btnSetNewWH.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
w = 5;
h = 5;
ds3d = new UniformGridDataSeries3D<>(Double.class, Double.class, Double.class, w, h);      

rs1 = sciChart3DBuilder.newSurfaceMeshSeries3D()
        .withDataSeries(ds3d)               
        .withDrawMeshAs(DrawMeshAs.SolidWireframe)
        .withStroke(0xFFE0E0E0)
        .withStrokeThicknes(1f)
        .withMaximum(5000)
        .withDrawSkirt(false)
        .withMeshColorPalette(new GradientColorPalette(colors, stops))
        .withOpacity(1.0f)
        .build();

surface3d.setTheme(R.style.SciChart_ElectricStyle);
surface3d.setCamera(camera);
surface3d.setXAxis(xAxis);
surface3d.setYAxis(yAxis);
surface3d.setIsFpsCounterVisible(false);
surface3d.setZAxis(zAxis);
surface3d.getRenderableSeries().add(rs1);
surface3d.getChartModifiers().add(sciChart3DBuilder.newModifierGroupWithDefaultModifiers().build());
    }
});

i have been working on line charts and i need to show date as well as time on the axis( 21 june 08 05:30:PM like this).I’ve tried with date axis and numeric axis ,but it doesn’t helps.Do we have any suggestions or samples which could help me

Hi,

I have a valid license key for development. But occasionally the charts show the message below and I have to restart the app to avoid that. May I ask is there a reason for that and how to fix it?

"Sorry! You have not set a License Key. You can request a free trial key from www.scichart.com/licensing-scichart-android or purchase at store.scichart.com."

Thanks,
Gang

I’m trying to implement sciChart to flutter app (Android). It gets pretty confusing when trying to make it work. Anyone have examples how to make SciChart to work on Flutter? Adding the license works just fine. Only need for ECG chart for now. Thanks.

I have a line chart and need to implement textAlign: left property for tickLabel on yAxis. I have found some way to do it on the forum, but it does not work in my case:
xAxis.setAxisTickLabelStyle(new AxisTickLabelStyle(Gravity.CENTER, Layout.Alignment.ALIGN_CENTER, 5, 0, 5, 0));
I get the error:
Alignment cannot be converted to int
But according documentation https://www.scichart.com/documentation/android/current/SciChart.Charting~com.scichart.charting.visuals.axes.AxisTickLabelStyle~_ctor.html AxisTickLabelStyle class get 5 int arguments. Can you help me please how to solve it!

i recently saw documentation about compositeannotation in wpf

do you have same version for android?
how to combine all annotation as one annotation?

My chart is dynamic, adding data from the right side all the time, and scrolling the chart to the left. Now the chart can manually scroll to the right indefinitely, but there are many blank areas on the right side. What can I do to limit the range of scrolling to the right? Is there any way to limit the zoom ratio to prohibit the chart from scrolling to the right indefinitely?

Hi, I just want to make sure

everything inside com.scichart.charting.visual will be considered as VIEW in MVVM pattern right?

thanks

In Scichart Android version 4.2.0.4557, ICategoryLabelProvider.transformDataToIndex(Date var1); accept date as parameter

but at version 4.2.0.4608, int transformDataToIndex(double var1); it accept double?

then how to convert date to double?

and another question.

1. how set start tick axis in category date axis?
   what i see here first tick of x axis always come with data, not like date axis which data can adapt their position itself.

2. how to set time frame in date axis like category date axis?

3. without scichart builder i cannot set time frame in categorydateaxis

I’m evaluating chart libraries to my next project and I’m trying to do a simple chart like the one in the attached image.
It was actually very easy to do it using MPAndroidChart, however it’s been hard to do a simple task like put a label aligned with the column… I did take a look into the SciChart sample application, but the application just uses numeric labels…
Can someone provide some guidance of how to do this?

Hello,

I am having some difficulties using a custom DateTickProvider.

I am trying to offset the values to “anchor” the chart to specific local time (see original question at “https://www.scichart.com/questions/android/axis-value-anchor” for details)

class CustomDateTickProvider() : DateTickProvider() {
    override fun updateTicks(minorTicks: DoubleValues, majorTicks: DoubleValues) {
        // super appears to sometimes recalc based on GMT, and sometimes provide offsets from my previous offsets.
        super.updateTicks(minorTicks, majorTicks) 

       // My offset code here, assumes tick values are GMT based...
    }
}

My code usually works, but sometimes it doesn’t. It appears that when I call super.UpdateTicks(..), it usually generates new ticks based on GMT, but sometimes it simply provides a small offset (like when I pan) based on existing tick values. Is that correct?

Is there a way for me to Force updateTicks to always recalculate based on GMT, or a way for me to tell if updateTicks is recalculating based off GMT or just doing offsets on the existing tick marks?

Or should I be going at this in a different direction?

Thank you.

Hi,
Im tried to convert date into xAxis using this tutorial

https://www.scichart.com/documentation/android/current/webframe.html#Axis%20APIs%20-%20Convert%20Pixel%20to%20Data%20Coordinates.html

but i got this error

Java.lang.RuntimeException: Unable to start activity ComponentInfo{}: java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.Object com.scichart.data.numerics.math.IMath.fromDouble(double)' on a null object reference

here my code

https://gist.github.com/ngiyus/4590c009261a28dba2c8b10e123a97f3

Hi,

I want to draw the shape of the waveform that stretches out from one point.
I tested it using ‘CreateEllipsoidMesh3DChartFragment’ from example source, but I found problem.

I initialized the displacement value to 0, and entered the displacement value of the point I wanted.
In the image I uploaded, the coordinates are symmetrical, but the shape is different.

Is there a rule that connects coordinates when you draw a triangle?
Is there any way I can control this?

I have attached the image and code.

best regards, Thank you