spectro: Data Stream Spectrogram Generator

In abhishekhanchate/readTDMS: R-based TDMS file format reader and analyzer

Description

The function aims to take a data stream in a vector form and based on the other input parameters specified, i.e. n, Fs, window, overlap, dbON, returns a list containing a vector of frequency components, time axis vector, frequency axis vector, and a plot of the spectrogram

Usage

spectro(x, n = 1024, Fs, window = 256, overlap = 128)

Arguments

x	is a vector containing a one dimensional data stream
n	is a integer (dyadic preferred) specifying the number of nfft points
Fs	is a integer specifying the sampling frequency
window	specifies the size of window to use for generating and plotting spectrogram (in points)(integer)
overlap	indicated the desired amount of overlap in the windowing process (in points)(integer)

Value

The function returns a list containing :

• freq_comps - A vector of normalized frequency components associated with the data stream

• timestamps - A vector of time stamps/points associated with the data stream spectrogram

• frequencystamps - A vector of frequency stamps/points associated with the data stream spectrogram

• spectro_img - A spectrogram plot with desired input parameters for the data stream

Examples

# Load the installed library/package
library(readTDMS)
# Specify required parameters
n <- 1024
window <- 256
overlap <- 128
Fs <- 1000
# Create or Import the data to be demeaned
data <- c(runif(10000))
# Call the Function to get the required plot
ans <- spectro(x = data, n = n, Fs = Fs, window = window, overlap = overlap)

abhishekhanchate/readTDMS documentation built on Dec. 18, 2021, 9:30 p.m.