CODEWITHSUNDEEP
plotlyplotly-dashplotly-python
Yogesh
Yogesh

Reputation: 801

Plotly-Dash line chart: custom color not working properly

I have a plot in which I want to have different color for different columns based on some logic.

col_dict = get_color_map(df.columns)
fig = px.line(data_frame=df, x=df.index, y=df.columns, color_discrete_map=col_dict)

The get_color_map function returns a dict with column names as keys as string "hsv(h, s, v)" as value.

The legends and hover data color are correct but the lines itself are just all white. I want the color of the lines to match the legend. enter image description here

Note: I tried using the color_discrete_sequence parameter as will, I got the same result only.

Upvotes: 1

Views: 459

Answers (1)

Yogesh
Yogesh

Reputation: 801

I think plotly express does not provide custom color map without specifying the color parameter, which in data frame case should be a column itself. Ref

So in this case where each column by itself should have different color without a hue column, it is best to use the plotly graph_object library.

The following code works:

fig = go.Figure()
for col in df.columns:
    fig.add_trace(go.Scatter(x=df.index, y=df[col], name=col, mode='lines', line=dict(color=col_dict[col])))

Upvotes: 1

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