Tags down


Is there a way to generate Square-Like Wave using Time Series data in Matplotlib?

By : Zelalem Senbetu
Date : October 17 2020, 06:10 AM
I wish did fix the issue. Use np.clip as:
code :
x=[12, 34, 97, -4, -100, -9, 31, 87, -5, -2, 33, 13, 1]
np.clip(x, a_min=-1, a_max=1)

array([ 1,  1,  1, -1, -1, -1,  1,  1, -1, -1,  1,  1,  1])
s = pd.Series(x)
s = s.clip(lower=-1, upper=1)
x = np.where(np.array(x)>0, 1, -1) # for series s = np.where(s>0, 1, -1)
0     1
1     1
2     1
3    -1
4    -1
5    -1
6     1
7     1
8    -1
9    -1
10    1
11    1
12    1
dtype: int64

Share : facebook icon twitter icon

How to generate a square wave using C#?

By : user3427274
Date : March 29 2020, 07:55 AM
hope this fix your issue The easiest way I can think of is to set y to be sign of a sine wave, making allowances for when it equals zero. I don't know if C# has the triple-operator, but something like this might work:
code :
y[k] = Math.Sin(freq * k)>=0?A:-1*A;

How do you generate a square wave using two inputs in labview?

By : Stefano Peduzzi
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Your math is off, you should calculate the 2 ms as a percentage of the pulse frequency. So with 50 Hz (or 20 ms) your duty cycle is 10%.

Create a sine wave from time series data (Python)

By : Ryan Chew Guan Rong
Date : March 29 2020, 07:55 AM
wish help you to fix your issue The current dataset that you show indeed looks nothing like a sine-wave but since all mathematically nice functions can be written as a superposition of sines and cosines, this need not be a problem.
More details in the docs: https://docs.scipy.org/doc/numpy-1.13.0/reference/generated/numpy.fft.fft.html#numpy.fft.fft
code :
import numpy as np
import matplotlib.pyplot as plt
T = 100
x = np.arange(0,T)
y=  np.sin(4*np.pi*x/T)+np.cos(8*np.pi*x/T)
sp   = np.fft.fft(y)               # the discrete fourier transform
freq = np.fft.fftfreq(y.shape[-1]) # the accompanying frequencies
             for i in range(len(freq))],axis=0)
              for i in range(len(freq))],axis=0)

plt.plot(x, y,x,cos+sin)
x=np.arange(0,T,0.01) # the interspacing of the datpoints for the (co)sines is 0.01
y = np.array([1,0,0,0,0,0,0,1,0]) # the input data you suggested
sp = np.fft.fft(y)
freq = np.fft.fftfreq(y.shape[-1])
             for i in range(len(freq))],axis=0)
              for i in range(len(freq))],axis=0)

plt.plot(np.arange(0,9), y,x,cos+sin)

How can I generate a square wave plot of a pulse train of multiple signals from the data in a csv file (in Linux)?

By : user3665115
Date : March 29 2020, 07:55 AM
Hope that helps For instance, given the data in a text file: , The answer I ended up with was:
code :
    file_info = os.stat( self.__outfile)
    if file_info.st_size:
        x,y,z,a = np.genfromtxt( self.__outfile, delimiter=',',unpack=True )
        fig = plt.figure(self.__outfile)
        ax = fig.add_subplot(111)

        test_array = [(datetime.datetime.utcfromtimestamp(e2).strftime('%d_%H:%M:%S.%f')).rstrip('0') for e2 in x]
        plt.xticks(x, test_array)
        l1, = plt.plot(x,y, drawstyle='steps-post')
        l2, = plt.plot(x,a-2, drawstyle='steps-post')
        l3, = plt.plot(x,z-4, drawstyle='steps-post')

        ax.set_xlabel('Time (s)')
        ax.set_title('Sensor Sequence')
        ax.legend([l1,l2, l3],['sprinkler','lights', 'alarm'], loc='lower left')

How can I get a square wave by using python pandas or matplotlib?

By : Tuan Anh
Date : March 29 2020, 07:55 AM
I wish this helpful for you One option is to simply set the linestyle of the plots to be "steps" using the linestyle= argument of df.plot():
code :
df.plot(x='StartDateTime', y=['UCL','LCL','P-bar','P'], linestyle='steps')
Related Posts Related Posts :
  • Python hex string encoding
  • Get week start date from week number
  • How to use imports from requirements.txt in python
  • Removing tab indent in ipython shell
  • I need to remove duplicates from a list but add the numeric value in them
  • Delay default arguments being read until function is called
  • Interpolate / fillna with a decay formula in pandas
  • What python package can translate Greek letter to ASCII requivalent?
  • How to get output of OS command from Jupyter notebook?
  • Printing AND writing the RIGHTLY formatted number
  • How do I create a shortcut to import most used python modules?
  • Matplotlib: Show selected date labels on x axis
  • Understanding memoization in Python
  • why does the len function return 2 on some iterations when they are all the same length?
  • Change in preference value does not affect the results of Affinity propagation Clustering
  • returning values inside a function
  • Why cant I use a variable in str slicing?
  • Section divider in Spyder
  • Conditional statement in selenium if element does not exists
  • Pandas : how to select index/row label in dataframe that matches a condition
  • What does zero do in A[0] in this code? Why not empty or another number?
  • Google App Engine urlfetch PayloadTooLargeError: Request exceeds 10 MiB limit for URL
  • Is there a way to set up optional arguments to bypass input arguments?
  • Suppress OpenMP debug messages when running Tensorflow on CPU
  • How to do GridSearchCV for F1-score in classification problem with scikit-learn?
  • Why does .pop() eventually stop and not keep removing items from a list until the list is empty?
  • How do I acess my Spider data from my main.py script?
  • Python Pandas Expand a Column of List of Lists to Two New Column
  • Overhead of python multiprocessing initialization is worse than benefits
  • Python Joining List and adding and removing characters
  • Adding an lxml library to project
  • Concatenating tensors in Tensorflow with None axis
  • Need help understanding why i get attribute error
  • How to force a MIDI device to report control status?
  • What does *** mean in Python -3?
  • How to get GFCC instead of MFCC in python?
  • How do I print a number n times in python?
  • How do i split a string wherever there are digits?
  • List Comprehension Python Prime numbers
  • "list index out of range" when reading data from file
  • What's the correct datetime format for the specified date string?
  • I cannot import CSV file?
  • Matplotlib pyplot plots look different after calling pandas profiling. How can I fix this?
  • Stopping all the instances of a specific region
  • Deal with Birtish summer time
  • Unable to use ColorWheel without loading kv (AttributeError)
  • What are these characters called: 。. !?etc Trying to split sentences stops working with non standard characters
  • rand.randint returning same number over and over?
  • Find longest sequence that does not contain a certain number
  • How do I convert a map object to list and also assign to a variable
  • sympy error: 'Symbol' object has no attribute 'pi'
  • How to remove words without vowels from a list in python
  • Downloading python to macbook
  • TypeError: __init__() missing 1 required positional argument: 'units'
  • Check if a class is a dataclass in Python
  • Unable to scrape google news heading via their class
  • Array of structs with dynamic allocation runs very slow in C in comparison to Python
  • Python Pandas - find all unique combinations of rows of a DataFrame without repeating values in the columns
  • How do I change the numbers in a cell to the word 'Bus' in Pandas Python
  • 'ascii' codec can't encode character : ordinal not in range (128)
  • shadow
    Privacy Policy - Terms - Contact Us © 35dp-dentalpractice.co.uk