# How can I multiply 2 signals?

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RandomChikiBum on 26 Dec 2021
Answered: DGM on 26 Dec 2021
I tried to plot the graph of product of 2 signals (Cosine and and decaying exponential) but am getting an error
x = (-100 :.05 :100);
y = cos(2*pi*x).exp(-x);
Dot indexing is not supported for variables of this type.
plot(x,y);
figure ;
title('Task-4 Cosine mutliplied with decaying exponential signal');
xlabel('Time');
ylabel('Amplitude');
RandomChikiBum on 26 Dec 2021
Edited: RandomChikiBum on 26 Dec 2021
And how can I multiply the power of the exponent with a constant?
like e^(-5x) or using decimal numbers?

DGM on 26 Dec 2021
Something like
x = (-1 :.05 :1); % pay attention to scale and limits
y = cos(2*pi*x).*exp(-5*x); % elementwise multiply with .*
plot(x,y);
title('Task-4 Cosine mutliplied with decaying exponential signal');
xlabel('Time');
ylabel('Amplitude');

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