Follow up to Previous Question

How do I display the calculations for each below?

clc
clear all
f=446000

f = 446000

Gf=10^-4*(sin(pi*(f-10^6)*10^-4)/(pi*(f-10^6)*10^-4))

Gf = -5.4645e-07

% calculate half-power beamwidth
function Bw = half_power_bw(f, Gf)
% Find the index of the maximum value in the magnitude spectrum
[~,imax] = max(abs(Gf));
% Find the indices of the half-power points
i_half_lower = find(abs(Gf) < abs(Gf(imax))/sqrt(2), 1, 'first');
i_half_upper = find(abs(Gf) < abs(Gf(imax))/sqrt(2), 1, 'last');
% Calculate the half-power bandwidth 
Bw = f(i_half_upper) - f(i_half_lower);
end

% null-to-null beamwidth
function Bw = null_to_null_bw(f, Gf)
% Find the first and last nulls of the magnitude spectrum
nulls = find(abs(Gf) == 0);
i_null_lower = nulls(1);
i_null_upper = nulls(end);
% Calculate the null-to-null bandwidth
Bw = f(i_null_upper) - f(i_null_lower);
end

% 99% of power beamwidth
function Bw = power_bw(f, Gf, power_fraction)
% Calculate the total power
total_power = trapz(f, abs(Gf).^2);
% Find the index where the cumulative power reaches the desired fraction
power_integral = cumtrapz(f, abs(Gf).^2);
i_power = find(power_integral >= total_power*power_fraction, 1, 'first');
% Calculate the bandwidth at the desired power fraction
Bw = f(i_power);
end

% Bandwidth beyond which the attenuation is 35 dB.
function Bw = attenuation_bw(f, Gf, attenuation_dB)
% Convert attenuation from dB to linear scale
attenuation_linear = 10^(-attenuation_dB/20);
% Find the index where the magnitude spectrum falls below the attenuation level
i_attenuation = find(abs(Gf) < abs(max(Gf))*attenuation_linear, 1, 'first');
% Calculate the bandwidth beyond the attenuation level
Bw = f(i_attenuation);
end

[Matt J]

Do we need to know what your previous question was? Some people weren't there.

Answer 1

[Matt J]

Just call the function, and omit a semicolon to see what its output is. However, your functions will not give nontrivial results unless f and Gf are vectors of the same size,

f=rand(1,10);
Gf=rand(1,10);

output = half_power_bw(f, Gf)

output = 0.0527

% calculate half-power beamwidth
function Bw = half_power_bw(f, Gf)
% Find the index of the maximum value in the magnitude spectrum
[~,imax] = max(abs(Gf));
% Find the indices of the half-power points
i_half_lower = find(abs(Gf) < abs(Gf(imax))/sqrt(2), 1, 'first');
i_half_upper = find(abs(Gf) < abs(Gf(imax))/sqrt(2), 1, 'last');
% Calculate the half-power bandwidth 
Bw = f(i_half_upper) - f(i_half_lower);
end