How to plot a lot of points with distinct color?

Question

I have a lot of points in dataframe. at first, I've grouped them based on their MMSI(each object has different MMSI) now I would like to plot them whereas the color of each plot varies according to its MMSI. after grouping, I have 1024 different MMSI thus I will have 1024 line. I want the color of these lines to be different.

def pl(x):
    display = plt.plot(x['X'],x['Y'])
    return display
Final_data.groupby('MMSI').apply(pl)

My output is like this but I think It can be better

My sample data is like this

what do you use for plotting? matplotlib? what is wrong with the information provided in the documentation? — Piglet, Aug 19 '19 at 07:06
@Piglet. yes, I'm using matplotlib. nothing is wrong. I don't know how to visualize my data properly — Danial, Aug 19 '19 at 07:09

Ted · Answer 1 · 2019-08-19T07:24:21.640

0

If you have seaborn:

import seaborn as sns
sns.lineplot(x='X', y='Y',
              hue='MMSI', data=Final_data);

or, using base matplotlib (from this answer):

import matplotlib.pyplot as plt

groups = Final_data.groupby('MMSI')

# Plot
fig, ax = plt.subplots()
for name, group in groups:
    ax.plot(group.X, group.Y, '-', label=name)
ax.legend()

plt.show()

edited Aug 19 '19 at 07:24

answered Aug 19 '19 at 07:11

Ted

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I've used your first option but I get the bellow error. AttributeError: module 'seaborn' has no attribute 'lineplot' – Danial Aug 19 '19 at 07:44
Ok, you'll have to upgrade your seaborn to version 0.9 (`!conda install -y -c anaconda seaborn=0.9.0` inside a jupyter notebook) – Ted Aug 19 '19 at 08:03

score 0 · Answer 2 · answered Aug 19 '19 at 07:12

If your goal is to set different colours to visualize, what i can suggest is to use the parameter of c in the plt.scatter, the parameter c can take in an array, so what you can do is to pass in the array of MMSI to c.

import matplotlib.pyplot as plt

X = [230030.4, 231587.71, 233648]
Y = [4000858,4000155, 3999243]

plt.scatter(X,Y, c = X)
plt.show()

How to plot a lot of points with distinct color?

2 Answers2