Plot or reshape 2D array matplotlib

Question

i have no idea how can i plot scatter with a 2D array of this type:

a=[[x0,t0],[x1,t1],...,[xn,tn]]

the plot should be x vs t, maybe instead of doing this with a maplotlib routine be able to reshape a to obtain:

a=[[x0,x1,...,xn],[t0,t1,...,tn]]

thanks!

Sohier Dane · Accepted Answer · 2016-08-28 21:59:10Z

3

Assuming your data starts in the format a = [[x0, t0]]:

Split x & t into separate lists, then you can pass them into matplotlib.

import matplotlib.pyplot as plt
x = [i[0] for i in a]
t = [i[1] for i in a]
plt.plot(x, t)

answered Aug 28, 2016 at 21:59

Sohier Dane

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Comments

akuiper · Accepted Answer · 2016-08-28 22:18:25Z

3

You can use numpy.transpose:

import numpy as np
a=[["x0","t0"],["x1","t1"],["xn","tn"]]

np.transpose(a)
# array([['x0', 'x1', 'xn'],
#        ['t0', 't1', 'tn']], 
#       dtype='<U2')

answered Aug 28, 2016 at 22:18

akuiper

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