matlab taylorwin c/c++

Taylorwin is a MATLAB function that computes the coefficients of a Taylor window, which is a type of window function used in signal processing. Here is an example of how to use it in MATLAB:

% Define parameters for the Taylor window
M = 64; % window length
beta = 5; % window shape parameter
wtype = 'symmetric'; % window type

% Compute the Taylor window coefficients
w = taylorwin(M, beta, wtype);

% Plot the window
plot(w);
title('Taylor window');
xlabel('Sample index');
ylabel('Amplitude');

In C/C++, you can implement the Taylor window function using the following code:

#include <math.h>

void taylorwin(int M, double beta, double *w)
{
    int n;
    double sum = 0.0, w0;

    // Compute the scaling factor for the window
    w0 = j1(beta);

    // Compute the window coefficients
    for (n = 0; n < M; n++) {
        double x = (2.0 * n - M + 1.0) / M;
        double y = beta * sqrt(1.0 - x * x);
        w[n] = j1(y) / (w0 * y);
        sum += w[n];
    }

    // Normalize the window coefficients
    for (n = 0; n < M; n++) {
        w[n] /= sum;
    }
}

This code uses the Bessel function `j1` from the `math.h` library to compute the scaling factor and the window coefficients. The `w` array is assumed to be pre-allocated with size `M`. To use this function, you can call it like this:

int M = 64;
double beta = 5.0;
double w[M];

taylorwin(M, beta, w);

// Use the window coefficients