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Koopakiller's avatar
Koopakiller
Regular Visitor
10 years ago

Logarithmic scaled scatter chart?

I am pretty new to Power BI and have some trouble with a scatter chart. The x-axis should be logarithmic scaled but I can only set it to linear.     What am I doing wrong?   PS: It's a ger...
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Koopakiller's avatar
Koopakiller
Regular Visitor
10 years ago

Hi v-qiuyu-msft,

 

thanks for your reply. I installed the newest version, but this time in English. Now I can use Log as the axis type.

 

For now, I need only a chart with positive logarithmic shown values. I would like to know if it is possible to configure a chart to something like that?

I tried to use two columns with positive and negative values but that does not work. The Log option is missing again.

But it seems to be no problem if the values are all negative.

v-qiuyu-msft's avatar
v-qiuyu-msft
Community Support
10 years ago

Hi Koopakiller,

 

BAsed on my test, if X-axis and Y-axis values contain negative values, and we have placed field in Details or Legend, the "Log" will disappear under Scale Type option. Please check if you have added any filed in Details or Legend properties.

 

Best Regards,
Qiuyun Yu

  • Koopakiller's avatar
    Koopakiller
    Regular Visitor
    10 years ago

    Hi v-qiuyu-msft

     

    I tried to add a new data source with some negative and positive numbers and set the X and Y Source of a scatter chart. I did not set a detail or legend field but the Log option is still not available. If I set a legend or details field it still not appears.

    • v-qiuyu-msft's avatar
      v-qiuyu-msft
      Community Support
      10 years ago

      Hi Koopakiller,

       

      In a scatter chart, if only X Axis and Y Axis properties have values(both negative and positive), only one data point displays in the chart as it's aggregated. In this scenario, Log option is available for X Axis Scatter type. But if we placed any field in Details or Legend property, Log option is not available. Please check attached .PBIX file.

       

      Best Regards,
      Qiuyun Yu

      • Koopakiller's avatar
        Koopakiller
        Regular Visitor
        10 years ago

        Hi all,

         

        v-qiuyu-msft

        I downloaded your file and selected the lower chart. The available scaling types for x-axis is still only "Linear":

        If I remove "Column" from Details, I was able to set the scale type to Log. So it works how you described it. My mistake was that I included a 0 in my test data.

         

        But I did not understand why I cannot set Details or Legend to use Log. Is there any explanation?

         

        BeardyGeorge

        Thanks a lot! Some time ago I played a little bit with R so it should be possible to me to use the script visual. After a short test I think it is more easy to use the R element instead of the build-in scatter chart for me. It is not so easy to figure out what I want but it is more powerful.