I'm trying to create an Altair faceted bar chart with lines that are represents other measure and would better use of a second y-axis on the right side. I don't know if it is possible using Atair. The code is as follows: import altair as alt import pandas as pd data = { 'Date': ['2023-01-01', '2023-01-02', '2023-01-01', '2023-01-02', '2023-01-01', '2023-01-02', '2023-01-01', '2023-01-02', '2023-01-01', '2023-01-02', '2023-01-01', '2023-01-02', '2023-01-01', '2023-01-02', '2023-01-01', '2023-01-02'], 'Value': [50, 200, 300, 150, 250, 350, 200, 200, 10, 20, 15, 20, 20, 30, 20, 30], 'DESCR': ['A', 'A', 'A', 'A', 'B', 'B', 'B', 'B', 'C', 'C', 'C', 'C', 'D', 'D', 'D', 'D'], 'Company': ['X', 'X', 'Y', 'Y', 'X', 'X', 'Y', 'Y', 'X', 'X', 'Y', 'Y', 'X', 'X', 'Y', 'Y'], } source = pd.DataFrame(data) bars = alt.Chart(source).mark_bar().transform_filter(f"(datum.DESCR=='A') | (datum.DESCR=='B')").encode( x='Date:N', y='Value:Q', color=alt.Color('DESCR:N', legend=alt.Legend(title=None)) ) lines = alt.Chart(source).mark_line().transform_filter(f"(datum.DESCR=='C') | (datum.DESCR=='D')").encode( x='Date:N', y='Value', stroke=alt.Stroke('DESCR', legend=alt.Legend(title=None), scale=alt.Scale(scheme='redblue')) ) chart = (bars+lines).facet(column='Company') chart I have tried .resolve_scale(y='independent') after .facet, but it doesn't show the second axis on the right side. Any help would be appreciated. Continue reading...