matplotlib - pandas - How to create multiple-labels in one plot?

Question

This is my code:

import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
from numpy.random import randn

df = pd.read_csv(r"XXXXXXX.txt")

df.plot(x='qPkw', y='vPkw', kind='scatter', figsize=(12, 12), use_index=True,
        title="q-v-Diagram (Pkw)", xticks=[0, 25, 50, 75, 100, 125], yticks=[0, 100, 200, 300, 400, 500],
        xlabel="v-Pkw", ylabel="q-Pkw", fontsize=15, color="black", label="Pkw")

df.plot(x='qLkw', y='vLkw', kind = 'scatter', figsize=(12, 12), use_index=True,
        title="q-v-Diagram (Lkw)", xticks=[0, 5, 10, 15, 20, 25, 30], yticks=[0, 100, 200, 300, 400],
        xlabel="v-Lkw", ylabel="q-Lkw", fontsize= 15, color="blue", label="Lkw")

plt.show()

Instead of one, I get two plots.

I just want to have these two in one plot. Also I want to label these two.

Someone sees the mistake?

How do you want to "label these two" if you want them in one plot? What do you mean by one plot? One set of axes, or two subfigures directly above each other? — 9769953
– 9769953, Commented May 10, 2022 at 8:17
I just want to have one "picture", but it should be clear which datas belongs to the color. The answer I got from you (below) is exactly what I wanted. Thanks a lot! — Yokanishaa
– Yokanishaa, Commented May 10, 2022 at 8:57

9769953 · Accepted Answer · 2022-05-10 08:15:54Z

1

Capture the first axis, and use the ax keyword in the second plot with the first axis.

ax = df.plot(x='qPkw', y='vPkw', kind='scatter', figsize=(12, 12), use_index=True,
        title="q-v-Diagram (Pkw)", xticks=[0, 25, 50, 75, 100, 125], yticks=[0, 100, 200, 300, 400, 500],
        xlabel="v-Pkw", ylabel="q-Pkw", fontsize=15, color="black", label="Pkw")

df.plot(x='qLkw', y='vLkw', kind = 'scatter', figsize=(12, 12), use_index=True,
        title="q-v-Diagram (Lkw)", xticks=[0, 5, 10, 15, 20, 25, 30], yticks=[0, 100, 200, 300, 400],
        xlabel="v-Lkw", ylabel="q-Lkw", fontsize= 15, color="blue", label="Lkw", 
        ax=ax)

Be aware that the first xticks and yticks settings will be ignored. The same for the xlabel and ylabel. That has to be, since it is in one figure.

answered May 10, 2022 at 8:15

9769953

12.5k3 gold badges31 silver badges46 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Yokanishaa Over a year ago

This is what I wanted. Thanks a lot!

Collectives™ on Stack Overflow

matplotlib - pandas - How to create multiple-labels in one plot?

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related