Plotly express scatter matrix hide upper half and diagonal

[divadlen]

How do you hide the upper half of the matrix generated by Plotly express scatter matrix? There doesn’t seem to be an in-built function to do that, unlike Plotly graph objects.

I’m asking because splom plots generate a lot of points and the redundant ones at the top half consume a lot of computational/graphic power.

As for the reason why I don’t use go.Splom, it is because they have a hard time splitting groups by legend. So if someone can answer this question that’ll be great too.

[AIMPED]

Hi @divadlen you can use showupperhalf=False. Here an aexample:

import plotly.express as px
df = px.data.iris()

fig = px.scatter_matrix(
    data_frame=df,
    dimensions=["sepal_width", "sepal_length", "petal_width", "petal_length"],
    color="species", symbol="species",
    title="Scatter matrix of iris data set",
    labels={col:col.replace('_', ' ') for col in df.columns}) # remove underscore

fig.update_traces(diagonal_visible=True,  showupperhalf=False)
fig.show()