Step plot

[limx0]

Feature Request

Description of Problem:

When viewing financial market data, it often makes sense to view a line plot as a "step" plot rather than a plain line plot (see example below), because it fits more accurately with our view of the values; an ask price that moves from 19 to 20 does not move in an interpolated fashion as the line plot shows, it is 19 until an order is cancelled or fill and then is is 20.

Plot source: https://hvplot.holoviz.org/user_guide/Plotting.html#step

It would be a great feature if perspective could support these kinds of plots.

Potential Solutions:

N/A

[timkpaine]

Unclear if this should be a separate chart or an option on line, I'd opt for the latter now that we have a nice UI for it?
d3fc/d3fc#698

    line.interpolate('step');

[texodus]

Ah this may be easy then. We are lacking real estate for column-unaffiliated plugin settings at the moment.

[timkpaine]

Should it be column unaffiliated? I know there are at least 3 interpolations which are useful, but I don't think you'd mix them. But it's a minor inconvenience to set per-column manually.

Edit: A nice reference: http://nickqizhu.github.io/d3-cookbook/src/chapter7/line-interpolation.html I would use linear obviously, plus step and monotone

[limx0]

Good resource; for clarification on the issue, I'm specifically looking for step-after.