Matrix dimensions must agree.

1 view (last 30 days)
Hi,
I am very new to the Matlab. I made one function which gives me an array of sinusoids. In arguments, I am providing an array of amplitude, frequency and phase. The other arguments are length and sampling frequency. When I call the function from command line I am getting error mentioned in the title. I have also tried with the .* method.
Can some one guide me the solve the problem?
Thanks.
Error:
Matrix dimensions must agree.
Error in generateSin (line 5)
function [z] = generateSin (a,f, ph,L, Fs)
T = 1/Fs;
tmax = L*T;
t = 0:T:tmax-T;
z = a.*sin (2*pi*t.*f + ph)
end
%command line function call sample : z = generateSin ([3,5,7], [5,10,15], [0,pi/2, pi/6], 1000, 300)
  1 Comment
Torsten
Torsten on 29 Jul 2019
t is a vector of length 1000, a, f and ph are vectors of length 3. What dimension do you expect z to have ?

Sign in to comment.

Accepted Answer

Andrei Bobrov
Andrei Bobrov on 29 Jul 2019
Edited: Andrei Bobrov on 29 Jul 2019
function [z] = generateSin (a,f, ph,L, Fs)
z = (a(:).*sin (2*pi*(0:L-1)/Fs).*f(:) + ph(:))';
end
  2 Comments
Ravikumar Mevada
Ravikumar Mevada on 29 Jul 2019
Hi,
Can you please explain, Why you have inserted ' at the end of the fourth line?
Andrei Bobrov
Andrei Bobrov on 29 Jul 2019
First please read part of help from MATLAB Getting Started.
In our case " ' " - sign transpoze our array.

Sign in to comment.

More Answers (0)

Categories

Find more on Matrices and Arrays in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!