Symmetry Shading in Logarithmic Scatter Charts

[whtrbbt]

Am wondering if this may be a bug.

I have a scatter chart which uses logarithmic x- and y-axes, and Symmetry Shading enabled (https://docs.microsoft.com/en-us/power-bi/visuals/power-bi-visualization-scatter#create-a-scatter-ch... to allow for easy eyeballing of whether a data point favours the x- or y-axis. However, this symmetry shading does not change / update when the axes range changes...

Before:

After:

The second screenshot shows how the shading has stayed perfectly diagonal across the visual, but should have changed - we would expect that the line would meet the y-axis at the $1000 tick, given that the x-axis minimum is now $1k.

If I use symmetry shading with the exact same data, but with linear x- and y-axes instead of logarithmic, the shading works correctly:

Here the shading line meets the y-axis at $40k as expected.

Am I doing something wrong, or is this a bug?

[parry2k · Accepted solution]

@whtrbbt never used it too much but looks like a bug, maybe report this an issue.

[whtrbbt]

Thanks @parry2k, have raised as a bug / idea in https://community.powerbi.com/t5/Issues/Bug-Symmetry-Shading-in-Logarithmic-Scatter-Charts/idi-p/224....

Temporary workaround is to do the log calculation as a calculated column or measure, then use that in the scatter as a "linear" scale. Not as neat and the axis values don't make perfect sense so have hidden them for now, but result is close to the desired output.