Log axis minor ticks

Log axis minor ticks

Posted by: benoit.laplante on 17 June 2024, 3:27 pm EST

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  benoit.laplante

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  Posted 17 June 2024, 3:27 pm EST

  Hi, I would to display minor ticks on log axis

  From the log axis demo: https://developer.mescius.com/wijmo/demos/Chart/LineArea/LogarithmicAxis/angular

  I changed the angular axisX element to:
  
  <wj-flex-chart-axis [wjProperty]=“‘axisX’” [logBase]=“10” minorTickMarks=“Inside” >

  with no effect when there is space to display 5 minor ticks between 1 and 10. It seams the default behavior is not to show any, but I also tried many different configuration of minorUnit with no success.

  How to display 5 minor ticks with current demo dataset ?

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  sonu.pandey

  

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  Posted 19 June 2024, 1:47 am EST

  Hi Benoit

  The observed behavior is by design. When using the logBase property of AxisX in a chart, minor tick marks will not appear due to the nature of logarithmic scaling. In a logarithmic scale, the intervals between tick marks are exponential rather than uniform. For example, with a log base of 10, tick marks are at 1, 10, 100, etc., leading to non-uniform spacing.

  Minor tick marks are generally placed at regular intervals between major ticks. On a linear scale, this is straightforward as the intervals are evenly spaced. However, on a logarithmic scale, the intervals grow exponentially, complicating the placement of minor ticks and potentially causing them to not render.

  Regards

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  benoit.laplante

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  Posted 20 June 2024, 12:02 pm EST - Updated 20 June 2024, 12:07 pm EST

  Hi Sonu,

  After discussing with our clients, they argue minor ticks or gridlines are important in log scale to see where the point sit on the scale. I agree, it is a complicate thing to calculate when the domain is not known in advance and the chart can be resized. This is the reason we want a chart lib to calculate this for us. Also, wijmo chart auto log major tick placement are quite far apart compared to linear scale, there is space to add minor ticks.

  I asking for a feature request to support of auto minor ticks and gridline for log axis. I attached an image of excel charts using auto minor tick and gridline using the same data set as wijmo log axis example. I also attached an image of wijmo charts showing how far apart he major labels on log scale versus linear scale.

  

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  sonu.pandey

  

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  Posted 21 June 2024, 8:19 am EST

  Hi,

  I appreciate your understanding, I have escalated your enhancement requirements to our development team for review with an internal tracking ID WJM-34192. I’ll update you on this as soon as I hear back from them.

  Regards