python - Plot line graph based on selected/filtered rows in dataframe

Question

I have a dataframe of footballers and their premier league fantasy football stats, I would like to create line plots for each player (x-axis: gameDate, y-axis: points)

Below is a def I created that filters the dataframe based on the player name and attempts the lineplot.

def PlotPlayerPoints(df, player):
    df = df.copy()
    df = df.filter(like=player, axis=0)
    
    plt.figure(figsize=(20,6))
    plt.title(player)
    sns.lineplot(data=ffmlDf, x="gameDate", y="points", estimator=None)
        
for player in ffmlDf['playerName'].unique():
    PlotPlayerPoints(ffmlDf, player)
    

The lineplot comes through as the exact same for each player, so my attempt at filtering clearly did not work.

question from:https://stackoverflow.com/questions/65599767/plot-line-graph-based-on-selected-filtered-rows-in-dataframe

Answer 1

I think you are looking for a hue parameter. Showing your df would help.

import pandas as pd
import seaborn as sns

df = sns.load_dataset('tips')
sns.lineplot(x='total_bill', y='size', hue='sex', data=df)

hue acts like a filter and draws the selected plot for each instance found in the hue parameter, so in your case hue would need to be the player.

Unless you want n lineplots for each player then, of course, you can use for loop.