Twin axis mixing bars and curves with legend?

HoloViews
1

I’ve got an overlay showing some bars, and a curve on the twin axis. Looks good, except that for whatever reason, the curve is not showing on the legend? The bars are

Partial screenshot:

image
image1464×1030 56.4 KB

IMO it’s kind of unclear what the green line is without it.

I tried adding another curve, thinking maybe it doesn’t do legend items when there’s just one of them, but that didn’t help

Partial code:

savings_pct_curve = hv.Curve(savings_pct_tidy*100).opts(ylabel="%")
savings_pct_curve.opts(color="green", tools=["hover"])
spend_bars = hv.Bars(spend_sums_tidy, kdims=[hv.Dimension("start"), "type"], vdims=["spend"])
spend_bars.opts(stacked=True, tools=["hover"], color=hv.Cycle(["lightgreen", "lightblue", "pink"]))

overlay = hv.Overlay([
    spend_bars, 
    deploys_lines,
    savings_pct_curve,
  ]).opts(
    opts.Overlay(
        responsive=True, height=500, xlabel='', ylabel="$k", multi_y=True, 
        yformatter=bokeh.models.formatters.CustomJSTickFormatter(
            code='''return tick/1000;'''
        ),
    ),
)
show(hv.render(overlay))
2

I think you need to specify a label for Curve.

import holoviews as hv
hv.extension("bokeh")

hv.Curve([0, 1, 2], label="Curve") * hv.Bars([0, 1, 3], label="Bar")

image
image690×678 23.2 KB

3

Thanks, that did it! I had set .opts(ylabel=...), but that didn’t do it. Still getting to grips with which kws go where :stuck_out_tongue:

1 Like
4

In HoloViews,

data, kdims, vdims, label, group are kwargs within hv.Curve(), hv.Bars(), etc

All the other “kwargs” are considered opts.

In hvPlot, most things are kwargs, but can also be set in opts.