I have dataframe tha tlooks similar to this:
>>>Hour Level value 0 7 H 1.435 1 7 M 3.124 2 7 L 5.578 3 8 H 0.435 4 8 M 2.124 5 8 L 4.578
I want to create line chart in plotly that will have different line style based in the column “level”.
Right now I have the line chart with the deafult line style:
import plotly.graph_objects as go fig = px.line(group, x="Hour", y="value",color='level', title='Graph',category_orders={'level':['H','M','L']} ,color_discrete_map={'H':'royalblue','M':'orange','L':'firebrick'}) fig.show()
I would like to control the linestyle for each level. until know I saw that the only way to do this is to add for each “level” but using add_trace as following:
# Create and style traces fig.add_trace(go.Scatter(x="Hour", y="value", name='H', line=dict(dash='dash'))) fig.add_trace(go.Scatter(x="Hour", y="value", name = 'M', line=dict(dash='dot'))) fig.show()
but I keep getting this error:
ValueError: Invalid value of type ‘builtins.str’ received for the ‘x’ property of scatter Received value: ‘Hour’
The 'x' property is an array that may be specified as a tuple, list, numpy array, or pandas Series
My end goal is to control the linestyle of the lines in my charts, better if I can do thatinside the part of “px.line”
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Answer
One way you can set different styles through variables in your dataframe is:
line_dash='Level'
Plot
Complete code
import plotly.graph_objects as go import pandas as pd import numpy as np import plotly.io as pio import plotly.express as px group = pd.DataFrame({'Hour': {0: 7, 1: 7, 2: 7, 3: 8, 4: 8, 5: 8}, 'Level': {0: 'H', 1: 'M', 2: 'L', 3: 'H', 4: 'M', 5: 'L'}, 'value': {0: 1.435, 1: 3.1239999999999997, 2: 5.577999999999999, 3: 0.435, 4: 2.124, 5: 4.578}}) import plotly.graph_objects as go fig = px.line(group, x="Hour", y="value",color='Level', title='Graph',category_orders={'Level':['H','M','L']} ,color_discrete_map={'H':'royalblue','M':'orange','L':'firebrick'}, line_dash='Level') fig.show()