| """ | |
| Tested on Linux with python 3.7 | |
| Must have portaudio installed (e.g. dnf install portaudio-devel) | |
| pip install pyqtgraph pyaudio PyQt5 | |
| """ | |
| import numpy as np | |
| import pyqtgraph as pg | |
| import pyaudio | |
| from PyQt5 import QtCore, QtGui |
Sometime you want to know the RMS of only some port of your signal or some part of your power spectral density.
In that case what you may is to start from the highest frequency bin, and add the power in each bin as you go. T his quantity is then the cumulative RMS of the spectrum. At each frequency point, f, the cumulative RMS is the RMS of the signal from the highest frequency to f.
def myrms(f, y_of_f):
df = np.diff(f)
df = np.append(df[0],df)
| # filter some data using SOS so as to preserve the dynamic range | |
| import numpy as np | |
| import scipy.signal as sig | |
| fs = 1024 | |
| bg_raw = np.random.randn(1000) | |
| # This is a bandpass |
| # Author: Sylvain Carlioz | |
| # 6/03/2017 | |
| # MIT license -- free to use as you want, cheers. | |
| # | |
| # rxa254@github.com | |
| # modified Jan/2019 | |
| # changed input args so it can run on a whole directory | |
| """ | |
| Simple python wrapper script to use ghoscript function to compress PDF files. |
| import matplotlib.pyplot as plt | |
| plt.rcParams.update({'text.usetex': False, | |
| 'lines.linewidth': 4, | |
| 'font.family': 'serif', | |
| 'font.serif': 'Palatino', | |
| 'font.size': 22, | |
| 'xtick.direction': 'in', | |
| 'ytick.direction': 'in', | |
| 'xtick.labelsize': 'medium', |
| # Created by https://www.gitignore.io/api/python,matlab,jupyternotebooks,macos,emacs,latex | |
| # Edit at https://www.gitignore.io/?templates=python,matlab,jupyternotebooks,macos,emacs,latex | |
| ### Emacs ### | |
| # -*- mode: gitignore; -*- | |
| *~ | |
| \#*\# | |
| /.emacs.desktop | |
| /.emacs.desktop.lock | |
| *.elc |
HowTo Time some Piece O' Code =========== I always forget how I should time little parts of my python code when I'm trying to optimize it, so I put it here so that I can just search for it later.
There's a bunch of timing functions in python: Some use various different clocks, but the Stack Exchange wisdom makes me want to use the timeit module.
Here's how its done ----.. codeblock:: python
Sometimes people (maybe mistakenly) upload large files to GIT which are not needed. We want our GIT repos to be small and only contain the necessary source files, i.e:
Those large files which don't need version control can be managed using GIT-LFS.
We can do this using the useful GIT BFG: https://rtyley.github.io/bfg-repo-cleaner/
I use this function to setup / resume my tmux sessions. If a session exists with the given name it resumes it, otherwise it creates it:
tm() {
[[ -z "$1" ]] && { echo "usage: tm <session>" >&2; return 1; }
tmux has -t $1 && tmux attach -d -t $1 || tmux new -s $1
}(N.b. If you use something similar already check you have the -d flag. This will kill old clients (e.g. ssh connections that died, quitting your terminal before disconnecting) and ensure the window resizes correctly.)