Adding noise to a sine wave
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Hi, I get error: Attempt to reference field of non-structure array. Error using + Matrix dimensions must agree.Error in (line 19), y=x+(alpha.v)
for following code please:
fs=8000;
tmax=4/360;
fangular=pi/10; % angular frequency (rad/sample).
n=1:fs*tmax;
A=1.2; % Amplitude
x=A*sin(n*fangular);
v=randn(1,64);
alpha=0.1;
noise=alpha*v;
y = x + noise;
plot(y)
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Answers (1)
Jos (10584)
on 23 Aug 2017
The expression "v.alpha" is interpreted by matlab as the contents of the field "alpha" of the structure variable "v". This is probably not what you meant.
You create v as a 1-by-64 array, and alpha is a scalar. I assume you want to simply multiply all elements of v by alpha, therefore:
v .* alpha
or, since alpha is a scalar,
v * alpha
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