errors when you get close to our floating point cutoff

[alexcjohnson]

If you make this plot, the range gets corrupted and nothing shows:

var trace1 = {
  x: [1, 2, 3, 4, 5],
  y: [
    30.326883631078317,
    31.130257299167397,
    1.7976931348623157e+303,
    1.6976931348623157e+304, // 1.79... does not fail, just disappears
    1.7976931348623157e+308 // this one always disappears
  ],
  mode: 'markers',
  type: 'scatter'
};

var data = [trace1];

Plotly.newPlot('myDiv', data);

The cutoff comes from FP_SAFE: Number.MAX_VALUE / 10000 so this issue has several parts:

• make sure that no input numbers can corrupt the range calculations (or anything else about the plot)
• perhaps it would be better to clip out-of-range numbers, rather than discarding them? I'm imagining cases where some program generates Number.MAX_VALUE as some sort of error condition or infinity value.
• see if we can increase FP_SAFE closer to Number.MAX_VALUE without breaking plotting or interactions (pay attention to log axes too in this whole thing)

cc @cldougl

[cldougl]

@alexcjohnson
Additional part: since plotly.js version 1.21.0, when mode:'lines' the entire line is not rendered when a value of ~1.79e+308 is present. See codepens:

plotly-1.20.5: http://codepen.io/plotly/pen/qRrWQB
latest version (1.22.0): http://codepen.io/plotly/pen/dNvGzj

[gvwilson]

Hi - this issue has been sitting for a while, so as part of our effort to tidy up our public repositories I'm going to close it. If it's still a concern, we'd be grateful if you could open a new issue (with a short reproducible example if appropriate) so that we can add it to our stack. Cheers - @gvwilson