Python downsampling

df_ham_downsampled = df_ham.sample(df_spam.shape[0])

Source: analyticsvidhya.com

How to do downsampling in python

import xarray as xr
import numpy as np
import matplotlib.pyplot as plt

fig, (ax1, ax2, ax3) = plt.subplots(1, 3, figsize=(15,5))

# Create a 10x10 array of random numbers
a = xr.DataArray(np.random.rand(10,10)*100, dims=['x', 'y'])

# "Downscale" the array, mean of blocks of size (2x2)
b = a.coarsen(x=2, y=2).mean()

# "Downscale" the array, mean of blocks of size (5x5)
c = a.coarsen(x=5, y=5).mean()

# Plot and cosmetics
a.plot(ax=ax1)
ax1.set_title("Full Data")

b.plot(ax=ax2)
ax2.set_title("mean of (2x2) boxes")

c.plot(ax=ax3)
ax3.set_title("mean of (5x5) boxes")

Source: stackoverflow.com

Similar codes

0 vote186 views1 answer
How to order randomly in django orm
Python Django
1 vote196 views1 answer
How to custom page not found in django
Python Django
1 vote181 views1 answer
How to smooth a function in python
Python
0 vote162 views1 answer
Py - count if a word is present in a column
Python
0 vote170 views1 answer
Taggablemanager serializer django
Python
36 votes162 views6 answers
Python lambda
Python
0 vote180 views1 answer
Php echo shorthand example
Python
-2 votes155 views2 answers
Extract directory python
Python
0 vote165 views1 answer
Pyserial example code
Python
0 vote155 views1 answer
Install open3d jetson nano aarch64
Python