Hi everyone!
I’m developing an app with dash and I’m producing a lot of graphs, and some of them are choropleth but I’m having a lot of trouble trying to hide the colorbar next to the figure (see picture) , I tried showscale = False and other things but nothing seems to work… Is there any way to solve my problem?
Thanks in advance!
Hi @Cloemdz
Did you try showlegend=None ?
Hi,
Yes I already tried but got the following error message: TypeError: choropleth() got an unexpected keyword argument ‘showlegend’
Do I need to put showlegend=None somewhere else?
For any trace type that has the colorscale property, showscale=True is the default setting, and showscale=False, removes the colorbar (it is not displayed).
We have two posibilites to set colorscale:
trace= go.Choroplethmapbox(z=z,
locations=locations,
colorscale='Viridis',
colorbar=dict(thickness=20, ticklen=3),
geojson=jdata,
hoverinfo='all',
marker_line_width=0.1, marker_opacity=0.7)
In this case the showscale is set either via trace.update or fig.data[corresponding_index].update(showscale=False),
or fig.update_traces(showscale=False), when len(fig.data)=1.
layout.coloraxis
trace= go.Choroplethmapbox(z=z,
locations=locations,
#colorscale='Viridis',
#colorbar=dict(thickness=20, ticklen=3),
coloraxis='coloraxis',
geojson=jdata,
hoverinfo='all',
marker_line_width=0.1, marker_opacity=0.7)
layout=go.Layout(width=700, height=600,
coloraxis=dict(colorscale=mapbox,
colorbar=dict(thickness=20, ticklen=3))
When the go.Figureclass was instantied
we perform this update to remove the colorscale:
fig.update_layout(coloraxis_showscale=False)
thank you for the detailed explanation @empet . It worked like a charm. I just corrected the spelling, taking one “s” off.
fig.update_layout(coloraxis_showscale=False)
Thank you!!! 
Hi @empet and @adamschroeder! Any idea how to shift the colorscale to the horizontal (so still show it but not on the vertical like in the above image)? I’ve tried a few combinations but without success so far… I imagine it’s a small variation of the above…
Is this what you’re looking for?
fig.update_layout(legend_orientation="h")
It must be something close to this…! But the colorbar is still displayed vertically when I tried it (also using plotly express).
fig = px.choropleth_mapbox(df, geojson=regions, locations=region_code, color=measure,
color_continuous_scale=style[0],
range_color=style[1],
mapbox_style=style[2],
# Automatic centering
zoom=get_zoom(regions),
center=get_coords(regions),
opacity=0.5,
)
fig.update_layout(legend_orientation="h")
Legends can be placed horizontally: https://plotly.com/python/legend/#horizontal-legend
but the colorbar can be displayed only vertically. You can control its position, length, thickness, by updating fig.layout like this:
fig.update_layout(coloraxis=dict(colorbar_x=1.1,
colorbar_y=0,
colorbar_len=0.75,
colorbar_thickness=20))
For more information print/display:
help(go.layout.coloraxis)
Setting x-position as x=-0.05, your colorbar is placed at the left side of your plot.
Alright, thanks for the comprehensive follow-up!
fig.update_coloraxes(showscale=False)
This is the exact solution.
You can check it
import plotly.express as px
fig = px.density_mapbox(lat=[37.2303], lon=[28.0908], radius=8,
center=dict(lat=37.2303, lon=28.0908), zoom=8,
mapbox_style="stamen-terrain")
fig.update_coloraxes(showscale=False)
fig.show()
Works for me! Thanks!!