# Multiplication of two different continuous signal in Matlab

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Aishwarya Bannai on 12 May 2021
Edited: Aishwarya Bannai on 18 May 2021
Hello,
I am trying to multiply a continous periodic sine wave to that of a rectangular pulse, But I see the error that the matrix dimensions must agree, Is it possible to multiply two different signals in MATLAB? can you please help me with one example code? or may be the commands that could be helpful.
x = 0:0.05:6;
y = sin(x)
subplot(3,1,1)
plot(x,y)
t1 = 0:0.05:1;
t2 = 1:0.05:2;
t3 = 2:0.05:3;
t4 = 3:0.05:4;
t5 = 4:0.05:5;
t6 = 5:0.05:6;
t=[t1 t2 t3 t4 t5 t6];
x1 = ones(size(t1));
x2 = zeros(size(t2));
x3 = ones(size(t3));
x4 = ones(size(t4));
x5 = zeros(size(t5));
x6 = ones(size(t6));
xs = [x1 x2 x3 x4 x5 x6]
subplot(3,1,2)
plot(t,xs);
ylim([-0.5 6])
%
% mul = xs.*y;
% subplot(3,1,3)
% plot(t,mul)
% ylim([-0.5 6])
The present code is this
Thank you

Stephan on 12 May 2021
Edited: Stephan on 12 May 2021
You made a mistake in defining t2...t6:
x = 0:0.05:6;
y = sin(x);
subplot(3,1,1)
plot(x,y)
t1 = 0:0.05:1;
t2 = 1.05:0.05:2;
t3 = 2.05:0.05:3;
t4 = 3.05:0.05:4;
t5 = 4.05:0.05:5;
t6 = 5.05:0.05:6;
t=[t1 t2 t3 t4 t5 t6];
x1 = ones(size(t1));
x2 = zeros(size(t2));
x3 = ones(size(t3));
x4 = ones(size(t4));
x5 = zeros(size(t5));
x6 = ones(size(t6));
xs = [x1 x2 x3 x4 x5 x6];
subplot(3,1,2)
plot(t,xs);
ylim([-0.5 6])
mul = xs.*y;
subplot(3,1,3)
plot(t,mul)
ylim([-0.5 6])
Aishwarya Bannai on 12 May 2021
Edited: Aishwarya Bannai on 18 May 2021
Thanks a lot Stephan,

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