Pre loader

Issue with LogarithmicNumericAxis and FastColumnRenderableSeries

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


I have an issue with LogarithmicNumericAxis and FastColumnRenderableSeries. If replace one of FastLineRenderableSeries with FastColumnRenderableSeries in Logarithmic Y-axis SciChart example you’ll receive empty chart (the same behaviour in my application). Only if disable logarithmic on both x and y axis the columns (and lines) appears. How to make LogarithmicNumericAxis with columns work?

  • You must to post comments
Best Answer

Hi Yury,

The reason you’ve seen empty chart is next: FastColumnRenderableSeries has property ZeroLineY, and it is 0 by default. When we try render the series, LogarithmicDoubleCoordinateCalculator try to get logarithm of 0, which is actually NaN, and therefore range for rendering is invalid.

Please try to set ZeroLineY different from 0. For example :

<s:FastColumnRenderableSeries ZeroLineY="1" FillBrush="#1964FF" SeriesColor="Blue"/>

Hope this helps.

Best regards,

  • You must to post comments

Hi Nazar
Thank you for your reply. But if I replcace a FastLineRenderableSeries in the Logarithmic Y-Axis example with your example string (FastColumnRenderableSeries ZeroLineY=”1″…) I still get the empty chart.

  • Nazar Rudnyk
    Hi Yury, It's also because of logarithm properties. In this particular example case, x values are really small, like 0.0001 etc, and when we try to draw column, we need to subtract half of the column width to get the left x value, and it's lower than 0, and therefore it's logarithm is NaN. Hope it helps. Best regards, Nazar
  • 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