Dynare forums

Hi,

I am having trouble using a variable to store shock values for use in a mod file. Specifically, I am trying to recreate the following code example (found here: http://www.dynare.org/manual/index_18.html):

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xx = [1.2; 1.3; 1];

shocks;
var e;
periods 1:3;
values (xx);
end;

When I run this, I receive an error in

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set_shocks

"Subscripted assignment dimension mismatch." I've identified that, when Dynare generates the M-file corresponding to my mod file, a call is made to

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set_shocks

, which includes the line

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set_shocks(0,1:3, 1, xx);

The problem with this line is that, given the way set_shocks works, it is trying to set a 3x1 vector equal to a 9x1 vector. That is, because the range 1:3 has length 3, the vector xx is duplicated using repmat() 3 times, even though xx already contains 3 values.

One solution would be to write,

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xx = [1.2; 1.3; 1];

shocks;
var e;
periods 1 2 3;
values (xx(1)) (xx(2)) (xx(3));
end;

which works, but is a hassle for a large number of shock periods, and according to the Dynare manual, should be unnecessary.

Can anyone provide some guidance? Thanks so much.

Hi, could you please post or send me the whole mod-file. I have trouble replicating the issue.