Plot scatter graphs with matplotlib subplot

Question

I am trying to plot a scatter diagram. It will take multiple arrays as input but plot into a single graph. Here is my code:

import numpy as np
import os
import matplotlib.pyplot as plt

ax = plt.gca()
n_p=np.array([17.2,25.7,6.1,0.9,0.5,0.2])   
n_d=np.array([1,2,3])
a_p=np.array([4.3,1.4,8.1,1.8,7.9,7.0])
a_d=np.array([12,13,14])

ax.scatter = ([n_d[0]/n_d[1]],[n_p[0]/n_p[1]])
ax.scatter = ([a_d[0]/a_d[1]],[a_p[0]/a_p[1]])

I will read the arrays from csv file, here I just put a simple example (for that I imported os). I want to plot the ratio of array element 2/ element 1 of n_p (as x-axis) and same with n_d (as y-axis). This will give a point in the graph. Similar operation will be followed by a_p and a_d array, and the point will be appended to the graph. There will be more data to append, but to understand the process, two is enough. I tried to follow example from here. If I use the color, I get syntax error. If I do not use color, I get a blank plot.

Sorry, my coding experience is beginner so code is rather nasty. Thanks in advance.

ax.scatter(...) not ax.scatter = (...) this is a typo. Call out typos in the comments, because question with typos are typically closed and deleted, as they aren't considered beneficial to the community. — Trenton McKinney
– Trenton McKinney, Commented Aug 10, 2021 at 20:32
Don't correct the question, because the typo is what was causing the error it seems. Rolled back — Trenton McKinney
– Trenton McKinney, Commented Aug 10, 2021 at 20:51

raphael · Accepted Answer · 2021-08-10 20:26:23Z

3

remove the = from the function call!

import numpy as np
import os
import matplotlib.pyplot as plt

ax = plt.gca()
n_p=np.array([17.2,25.7,6.1,0.9,0.5,0.2])   
n_d=np.array([1,2,3])
a_p=np.array([4.3,1.4,8.1,1.8,7.9,7.0])
a_d=np.array([12,13,14])

ax.scatter([n_d[0]/n_d[1]],[n_p[0]/n_p[1]])
ax.scatter([a_d[0]/a_d[1]],[a_p[0]/a_p[1]])

answered Aug 10, 2021 at 20:26

raphael

3,1891 gold badge20 silver badges33 bronze badges

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

2 Comments

Pro Over a year ago

Could you tell me whats is the ax=plt.gca() mean?

raphael Over a year ago

it means return the axis that is currently focused, and if no axis exists then create one ... it's actually better to use something like f, ax = plt.subplots() instead of plt.gca()

Collectives™ on Stack Overflow

Plot scatter graphs with matplotlib subplot

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related