I can't generate arch and garch data

[jfca283]

Here is my code for a arch and garch processes. The problem is i'm not generating dates associated to simarch/simgarch, so when i try to show a correlogram, i get a malfunction error. So, how do i generate 1000 observations simulating an arch and garch processes for afterward see their correlograms and other tests?

Code: Select all

create u 1 1001 !length=1001 series errores=nrnd series eta1=nrnd series eta2=nrnd vector(!length) sigma errores(1)=0.55 vector(!length) sigma vector(!length-1) simarch vector(!length-1) simgarch sigma(1)=0.8^2 for !i=1 to 1000 simarch(!i)=10+0.5*errores(!i)^2+eta1(!i) simgarch(!i)=10+0.5*errores(!i)^2+0.6*sigma(!i)+eta2(!i) sigma(!i+1)=simgarch(!i) next

[EViews Gareth]

Is there a reason you're mixing vectors and series?

Also, have you tried using the TSDGP add-in? It can create data that follows a GARCH process.