Matplotlib.axes.Axes.format_coord() in Python
Last Updated :
19 Apr, 2020
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Matplotlib is a library in Python and it is numerical - mathematical extension for NumPy library. The Axes Class contains most of the figure elements: Axis, Tick, Line2D, Text, Polygon, etc., and sets the coordinate system. And the instances of Axes supports callbacks through a callbacks attribute.
The Axes.format_coord() function in axes module of matplotlib library is used to return a format string formatting the x, y coordinates.
Python3
Output:
Example-2:
Python3
Output:
Matplotlib.axes.Axes.format_coord() Function
Syntax: Axes.format_coord(self, x, y) Return value: This method return a format string formatting the x, y coordinates.Below examples illustrate the
matplotlib.axes.Axes.format_coord() function in matplotlib.axes:
Example-1:
# Implementation of matplotlib function
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.pyplot as plt
import numpy as np
# make an agg figure
fig, ax = plt.subplots()
ax.plot([1, 2, 3, 7], [1, 5, 6, 9])
def format_coord(x = 7, y = 9):
col = int(x + 0.5)
row = int(y + 0.5)
if col >= 0 and col < 5 and row >= 0 and row < 5:
z = row + col
return 'x =% 1.4f, y =% 1.4f, z =% 1.4f' % (x, y, z)
else:
return 'x =% 1.4f, y =% 1.4f' % (x, y)
ax.format_coord = format_coord
fig.suptitle('matplotlib.axes.Axes.format_coord()\
function Example', fontweight ="bold")
plt.show()
# Implementation of matplotlib function
import numpy as np
import matplotlib.pyplot as plt
# Fixing random state for reproducibility
np.random.seed(19680801)
X = np.random.rand(15, 30)
fig, ax = plt.subplots()
ax.imshow(X)
val1, val2 = X.shape
def format_coord(x, y):
col = int(x + 2)
row = int(y - 2)
if col >= 0 and col < val2 and row >= 0 and row < val1:
z = X[row, col]
return 'x =% 2.0f, y =% 2.0f, z =% 2.0f' % (x, y, z)
else:
return 'x =% 2.0f, y =% 2.0f' % (x, y)
ax.format_coord = format_coord
fig.suptitle('matplotlib.axes.Axes.format_coord() \
function Example', fontweight ="bold")
plt.show()
