Log plot in plotly.py issues

📊 Plotly Python
1

Hi,

Having some issues with log plots in py. First issue is when I define log axes ticks the y-axis label flies off to the side - I raised this on git here - https://github.com/plotly/plotly.py/issues/2359

And today I have tried to get my Y-axis to start at 0.

I start with this plot:

logPlot
logPlot1578×618 28.3 KB

Which doesn’t start at 0 on the Y. So I first tried to set

yaxis_rangemode='tozero'

In the update_layout method but this didn’t appear to do anything.
So I set the axes manually using

yaxis_range=[0,200]

as the max point is ~150. This results in a weird compressed plot:

logPlot_manualAxes
logPlot_manualAxes1549×613 17.3 KB

Which even when I zoom in on doesn’t actually seem to have started at 0?:

logPlot_manualAxes_ZOOM
logPlot_manualAxes_ZOOM1817×704 27.8 KB

Any ideas? I need to start the Y-axis at 0. I’m not even too bothered about having the max set to 200 - it’s fine as it was in the original plot.

Thanks.

2

Hi @gt91 welcome to the forum! The values you pass in yaxis_range need to be the log10 of the bounds, for example if your max data point is 200, you will pas np.log10(200)=2.3. As for 0, log of 0 is not defined but maybe you meant 0=np.log10(1). In this case, you should pass (0, 2.3).

3

Hi @Emmanuelle, thanks - I was being a bit dense there. That all makes sense. Any idea about the y-axis label flying off to the side?

4

I answered directly in the issue - seems to be an automargin problem.