Generate dampening sine waves of various frequencies

I'm trying to generate dampening sine waves of various frequencies and stitch them all together. Time interval is of 1 second for each frequency, amplitude 2, phase 0, decay constant 2.5 and the following frequencies in this order:

261, 293, 309, 348, 393, 419, 492, 522, 467, 413, 393, 353, 309, 293, 261

I'm trying to do this with following code;

for i = 1:15;
    yi = (A*exp(-lemda*t)).*(sin(2*pi*f(i)*t+w));

    % plot
    subplot(16,1,i);
    plot(t,yi);
    title(['f = ' num2str(f(i))]);

    % sound file
    % sound(yi);

    audiowrite(path,yi,fs);
    [zi, fs] = audioread(path);
    y = [y; zi];
    sound(y);

    
end;

But it is giving me error;

Error using vertcat

Dimensions of arrays being concatenated are not consistent.

Error in Q5_a (line 28)

y = [y; zi];

Can someone help me out? I'm new to matlab, everything seems big here. Thanks in advance.

Answer 1

[Image Analyst]

This works for the first two sounds, but you can't have 3, quad, or more sound channels so it won't work for the 3 through 15 loop:

t = linspace(0, 1, 3000);
A = 2;
lambda = 2.5;
f = [261, 293, 309, 348, 393, 419, 492, 522, 467, 413, 393, 353, 309, 293, 261];
w = 0;
for i = 1:15
	yi = (A*exp(-lambda*t)) .* (sin(2*pi*f(i)*t  +w));
	% plot
	subplot(4, 4, i);
	plot(t,yi, 'b-');
	title(['f = ' num2str(f(i))]);
	grid on;
	sound(yi);
	fileName = 'deleteme.wav';
	audiowrite(fileName,yi, f(i));
	[zi, fs] = audioread(fileName);
	if i == 1
		y = yi
	else
		y = [y; zi'];
	end
	sound(y);
end

[Naila Akbar]

So how can I achieve my requirement of loop through 15 values? or I can't?

[Naila Akbar]

my problem solved by changing this

y = [y; zi']; 

to this

y = [y, zi'];