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Inconistent numeric format on logarithmic axis labels #1920

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AndiMD opened this issue Jul 30, 2017 · 3 comments · Fixed by #1930
Closed

Inconistent numeric format on logarithmic axis labels #1920

AndiMD opened this issue Jul 30, 2017 · 3 comments · Fixed by #1930
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bug something broken

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@AndiMD
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AndiMD commented Jul 30, 2017

Hi all,

The following example shows inconsistent x-axis labels.
Result: 10e+21, 100e+21, 1e+24, 10e+24, 100e+24, 1e+27
Expected: 1e+22, 1e+23, 1e+24, 1e+25, 1e+26, 1e+27

Can this be improved? Thanks!

<html>
<head> <script src="https://cdn.plot.ly/plotly-latest.min.js"></script> </head>
<body> 
<div id="TEST" class="plotly-graph-div"></div>
<script>
    window.PLOTLYENV=window.PLOTLYENV || {};
    window.PLOTLYENV.BASE_URL="https://plot.ly";
    Plotly.newPlot('TEST', [{"mode":"lines","y":[0.0,1.0],"type":"scatter","x":[1.0e22,1.0e27]}],
               {"xaxis":{"type":"log"},"margin":{"l":50,"b":50,"r":50,"t":60}}, {showLink: false});
</script>
</body>
</html>

CrossRef: JuliaPlots/PlotlyJS.jl#132
@AndiMD AndiMD mentioned this issue Jul 30, 2017
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@etpinard
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etpinard commented Jul 31, 2017 •
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You might want to look at the exponentformat attribute:

https://plot.ly/javascript/reference/#layout-xaxis-exponentformat

I think for your use case, setting exponentformat: 'power' seems best, see:

https://codepen.io/etpinard/pen/VzajrW?editors=0010

@etpinard
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etpinard commented Aug 1, 2017

@AndiMD is exponentformat: 'power' giving you the desired result?

@alexcjohnson
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True, exponentformat: 'power' can fix it in this case - @AndiMD the default is 'B' ie SI prefixes except for billion - but I do think there's a good argument to be made that continuing to round the exponent to a factor of 3 when we're beyond the range of SI prefixes (the range we've deemed common enough to use anyway, ie femto to tera) serves no purpose and can be misleading, so we can consider this a bug.

@alexcjohnson alexcjohnson added the bug something broken label Aug 2, 2017
@alexcjohnson alexcjohnson mentioned this issue Aug 4, 2017
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Better exponent treatment beyond SI prefixes plotly/plotly.js
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@alexcjohnson @etpinard @AndiMD