MA(1) process without using built-in functions

Leonardo Aldeghi

2019 10 21

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3 次查看（30 天）

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Hi everybody, i'm trying to write a MA(1) process without using built-in functions (homework) and with these input parameters

theta (MA parameter)
sigma (standard deviation of innovations)
epsilon0 (starting value)
T (total length of the time series to simulate)

function y = simulateMA1(theta, sigma, epsilon0, T)
y(1)=epsilon0;                    
for k=2:T                       
    epsilon(k)=(sigma^2)*randn;             
    y(k)=epsilon(k)+theta*epsilon(k-1);     
end                             
y=y'                                       % shifting to column vector
end

I'm using the grader and no error message comes out, but there is something wrong that i'm missing with the model. Can anybody share his tought about this?

Thankss