How to Hide NULL Values In Line/Spline Line Charts

[Simon Chan]

My objective is to generate a Spline Line chart with two segments with different color. My first attempt is to use data binding to change the color of line segments but no luck.

Now, I'm trying another approach; to create two spline line charts with different color. Since I'm using MVVM data binding, I create a collection with three fields, namely, the date field, 1st spline line value & 2nd spline line value. I set the first half of 2nd spline line value to null and the second half of 1st spline line value to null. After I bind the collection to the chart, the outcome is no good,
1. The RadChart control treats null as zero. Consequently, the two spline lines are shown from the start date and end date instead of only showing non-null data.
2. The turning point of the two lines looks like broken and does not join smoothly.

Would you please advise,
1. Is there any way to hide null values in line/spline line charts?
2. Is there any other way to achieved my objective?

Regards,
Simon

[Dwight]

Hi Simon,

Currently there is no way to cover this scenario. Line, Spline and all Area series are rendered as single visual element. The empty values feature is not currently supported. It is in our plans, but I cannot give you time-frame for it's completion.

Best,
Evtim
the Telerik team

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[Matthew]

We need this feature in order to continue using this product.

What we are trying to have is 5 seperate lines with an x axis for datetime.  But at each time point only one of the lines will have an actual measurement.

Is this something that will be supported in the very near future?

Matthew

[Dwight]

Hello Matthew,

Our current plans are to include this feature for the Q2 2010 release.

All the best,
Joshua
the Telerik team

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[Alexey Oyun]

Hi,
Does this feature implemented in Q2 2010? I am currently working on Q2 beta and it seems that we can't assign null to YValue.

I am hunting all requests for this feature, since I don't want to write hack methods to overcome this problem. Here are other posts on this topic.

http://www.telerik.com/community/forums/silverlight/chart/missing-point-charts.aspx
http://www.telerik.com/community/forums/silverlight/chart/chart-drawing-with-null-yvalue.aspx

We also need this feature for our product.

Thanks, Alex.

[Dwight]

Hi Alexey,

Unfortunately, we had to reschedule this feature and it is yet to be developed.

Best wishes,
Joshua
the Telerik team

[Alexey Oyun]

That is really bad news for me. Since in real life application you almost never have ideal data. There is always some data missing :(

Could you post link in PIT so we could vote for it.

Alex.

[Dwight]

Hello Alexey,

Here is the PITS link: http://www.telerik.com/support/pits.aspx#/public/silverlight/2696

Kind regards,
Joshua
the Telerik team

[Richard]

Has this been completed?  I see it's slated for Q2 of 2011....

[Sia]

Hello Richard,

Here is what we have currently. RadChart supports empty values in a three possible ways - Zero, Drop and Gap.

Regards,
Sia
the Telerik team