EViews.com

Posted: **Wed Mar 14, 2012 9:01 pm**

Hi,
I am trying to replicate a matlab code in EViews but having trouble doing the following loop;

for jj=1:nstep;
impz(jj,:)=shock(jj,:)+zlag*betaz(1:length(betaz),:);
zlag=[impz(jj,:) zlag(1,1:(nlags-1)*nvars)];
end;

I've managed to convert lots of stuff but having trouble with this kinda looping and concatenation. Could anyone please help me with this? Thanks

C.

Posted: **Wed Mar 14, 2012 11:46 pm**

Can anyone respond please?

Posted: **Fri Mar 16, 2012 12:18 am**

Could you please at least tell us the dimensions of matrices/vectors you are dealing with?

Posted: **Fri Mar 16, 2012 12:38 am**

Thanks for your reply Trubador,
impz=15*7
shock=15*7
zlag=1*28
betaz=28*7
nlags=4
nvars=7

Hope it helps

C.

Posted: **Sat Mar 17, 2012 7:27 am**

This should be doing what you want:

Code: Select all

!nvars = @columns(shock)
!nstep = @rows(shock)
!nlags = 4
!extract = (!nlags-1)*!nvars
rowvector temp1
rowvector temp2

for !jj = 1 to !nstep
  temp1 = @rowextract(shock,!jj)+zlag*betaz
  temp2 = @subextract(zlag,1,1,1,!extract)
  rowplace(impz,temp1,!jj)
  matplace(zlag,temp1,1,1)
  matplace(zlag,temp2,1,!nvars+1)
next

delete temp*

Posted: **Sun Mar 18, 2012 12:23 am**

Trubador, that's awesome. Many thanks

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