How can I concatenate two vectors?

Hi ! How can I 'join vector C and signal to get a matrix?

I've tried like this but I dont know if its okay.

Thanks in advance.

f_sine=3e6;                      % sine frequency [Hz]
T1=1/f_sine;                     % sine period
n=5;                        % number of periods
tt=n*T1;

t1 = 0:dt:tt-dt;
burst=sin(2*pi*f_sine*t1);

ww1=hanning(length(burst)/2);
ww=[ww1;zeros(length(burst)/2,1)];

signal=burst.*ww';

iterations=30000;
C = zeros(1, iterations-numel(signal));
v = [signal, C]';

[Robert U]

Hi mm99,

your code snippet is not executable. "dt" and "N" are not given. As far as I see, "signal" is a vector whereas "vector" is a matrix. I guess, matrix dimensions and vector do not match, thus joining them is not possible. Provide executable code, and somebody will figure out how to match your variable sizes.

Kind regards,

Robert

[mm99]

corrected!

Answer 1

[Turlough Hughes]

How can I 'join vector C and signal to get a matrix?

Depends on whether signal is a column vector or row vector

If it's a column vector you probably want to add a column of zeros to the right of signal:

v = [signal zeros( size(signal,1),1 )].' % note the matrix is transposed as you wrote in the original code

If its a row vector you could add zeros below singal as follows:

v = [signal; zeros( 1,size(signal,2) )].'

[mm99]

thank you! but what about the C vector which consists of elements of number equal to iterations - number of signal elements? I need the final output v to have number of elements equal to the elements of iterations and to contain the elemets of signal.

[Turlough Hughes]

Ok, I see what you are asking.

v = zeros(1,iterations);
v(1:numel(signal))=signal;

[mm99]

thanks a lot!