Size of this preview: 800 × 533 pixels. Other resolutions: 320 × 213 pixels | 640 × 427 pixels | 1,024 × 683 pixels | 1,500 × 1,000 pixels.
Original file (1,500 × 1,000 pixels, file size: 50 KB, MIME type: image/png)
This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
DescriptionPeriodogram.png |
Developed using scipy.signal.periodogram. |
|||||
Date | ||||||
Source | Own work | |||||
Author | Kirlf | |||||
Other versions |
|
|||||
PNG development InfoField | This plot was created with Matplotlib. | |||||
Source code InfoField | Python codeimport numpy as np
from scipy import signal
import matplotlib.pyplot as plt
w_1 = 30 # frequency of the 1st component of the signal (Hz)
w_2 = 50 # frequency of the 2nd component of the signal (Hz)
a = 1.1 # magnitude of the 1st component of the signal
b = 0.6 # magnitude of the 2nd component of the signal
t = np.array([i for i in range(1,301)])/1000 # time samples (s)
fs = 1 / (t[1]-t[0]) # sampling frequency (Hz)
x = a*np.cos(2*np.pi*w_1*t) + b*np.sin(2*np.pi*w_2*t) # considered signal
f, Pxx_den = signal.periodogram(x, fs=fs, scaling='spectrum')
plt.subplots(1, 1, figsize=(6, 4), dpi=250)
plt.stem(f[:50], Pxx_den[:50], '-')
plt.ylabel('Spectrum')
plt.xlabel('Frequencies (Hz)')
plt.title('Periodogram')
plt.grid(True)
plt.show()
|
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
Items portrayed in this file
depicts
20 February 2019
image/png
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 05:21, 20 February 2019 | 1,500 × 1,000 (50 KB) | Kirlf | User created page with UploadWizard |
File usage
No pages on the English Wikipedia use this file (pages on other projects are not listed).
Metadata
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
Horizontal resolution | 98.42 dpc |
---|---|
Vertical resolution | 98.42 dpc |
Software used |
|
Retrieved from "https://en.wikipedia.org/wiki/File:Periodogram.png"