CODEWITHSUNDEEP
numpymatplotlib
Ashok K Harnal
Ashok K Harnal

Reputation: 1221

How to display just the mesh of meshgrid

The following four lines will create a rectangular meshgrid with bottom-left corner as (-5,-5) and top-right corner as (5,5). The width of each cell in the meshgrid will be 0.55 and height will 0.5. Is it possible to just display this created mesh in python? That is, without superimposing on it any other plot of a function? 

import numpy as np
x = np.arange(-5, 5, 0.55)
y = np.arange(-5, 5, 0.5)
xx, yy = np.meshgrid(x, y)

I Will be grateful for help. Thanks.

Upvotes: 4

Views: 3484

Answers (2)

Philippe Miron
Philippe Miron

Reputation: 178

You could plot a zero matrix with pcolormesh and show the edges.

import matplotlib.pyplot as plt
import numpy as np

x = np.arange(-5, 5, 0.5)
y = np.arange(-5, 5, 0.5)

fig = plt.figure()
ax = fig.add_subplot(1,1,1)
ax.pcolormesh(x, y, np.zeros((len(y)-1, len(x)-1), edgecolor='k')

Upvotes: 0

tom10
tom10

Reputation: 69172

You can use matplotlib's plot to put a point at each point of the grid. enter image description here

plt.plot(xx, yy, ".k")
plt.show()

Here, this is actually plotting each column as a separate plot, and would give each a separate color, which is why I set ".k", where the k makes every point black. If you don't like this behavior you could do:

plt.plot(xx.flat, yy.flat, ".")

Upvotes: 7

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