Is it possible to hide contour lines in Histogram2dContour() method for Python?

📊 Plotly Python
1

Is it possible to hide the contour lines from the Histogram2dContour plot in this example?

import plotly.graph_objs as go

import numpy as np

t = np.linspace(-1,1.2,2000)
x = (t3)+(0.3*np.random.randn(2000))
y = (t6)+(0.3*np.random.randn(2000))

trace1 = go.Scatter(
x=x, y=y, mode=‘markers’, name=‘points’,
marker=dict(color=‘rgb(102,0,0)’, size=2, opacity=0.4)
)
trace2 = go.Histogram2dContour(
x=x, y=y, name=‘density’, ncontours=20,
colorscale=‘Hot’, reversescale=True, showscale=False
)
trace3 = go.Histogram(
x=x, name=‘x density’,
marker=dict(color=‘rgb(102,0,0)’),
yaxis=‘y2’
)
trace4 = go.Histogram(
y=y, name=‘y density’, marker=dict(color=‘rgb(102,0,0)’),
xaxis=‘x2’
)
data = [trace1, trace2, trace3, trace4]

layout = go.Layout(
showlegend=False,
autosize=False,
width=600,
height=550,
xaxis=dict(
domain=[0, 0.85],
showgrid=False,
zeroline=False
),
yaxis=dict(
domain=[0, 0.85],
showgrid=False,
zeroline=False
),
margin=dict(
t=50
),
hovermode=‘closest’,
bargap=0,
xaxis2=dict(
domain=[0.85, 1],
showgrid=False,
zeroline=False
),
yaxis2=dict(
domain=[0.85, 1],
showgrid=False,
zeroline=False
)
)

go.Figure(data=data, layout=layout)

Screen Shot 2020-03-06 at 17.56.58
Screen Shot 2020-03-06 at 17.56.58988×1022 141 KB

2

Hi @sugar_donut,
To get a Histogram2dContour without contour lines remove from trace2 definition, ncontours=20, and insert
contours_showlines=False.

To get nicer 1d histograms, update layout as follows:

fig.update_layout(bargap=0.015)

3

Ah okay, no wonder because there is no contours_showlines argument in the doc! Thanks so much and also for the update layout tip!

4

@sugar_donut Have you searched the docs at https://plot.ly/python/reference/ ???

See here : https://plot.ly/python/reference/#histogram2dcontour-contours-showlines

5

I did but it was hard to navigate around because it’s a long list, that’s kinda unstructured, and none of the keywords I used pulled it up.