 # error message G0520 : Arguments not conformable

For the following formula I get the error message `G0520 : Arguments not conformable`

Can anyone help me what I did wrong?

``y = 100*(trimr(d,1,0) - trimr(d,0,1)) ~ 100*(trimr(d,2,0) - trimr(d,1,0)) ~ trimr(s - x*theta_pv,1,0);``

Before the formula was just

``y = 100*(trimr(d,1,0) - trimr(d,0,1))  ~ trimr(s - x*theta_pv,1,0);``

but I wanted to increase the number of lags to two. However now for the modified version I get this error message.

I would be very grateful for your support.

0

This error is occurring, because the terms:

``````(trimr(d,1,0) - trimr(d,0,1));

and

(trimr(d,2,0) - trimr(d,1,0));``````

have different numbers of rows. As a specific illustration, if:

``````d = { -0.3,
0.65,
-0.21,
0.89,
-1.25 };``````

then:

``````(trimr(d,1,0) - trimr(d,0,1)) =

0.650   -  -0.300  =   0.950
-0.210   -   0.650  = -0.860
0.890   -  -0.210  =  1.100
-1.250   -   0.890  = -2.140``````

However,

``````(trimr(d,2,0) - trimr(d,1,0)) =

-  -0.300  =   error, rows do not match (arguments not conformable)
-0.210    -   0.650  = -0.860
0.890    -  -0.210  =  1.100
-1.250    -   0.890  = -2.140``````

I am not certain what you are trying to do, but if you wanted the first and second lag of the first difference, you could to this:

``````first_diff = (trimr(d,1,0) - trimr(d,0,1));
fd_lag12 = lagn(first_diff, 1| 2);``````

or simply

``````y = lagn(trimr(d,1,0) - trimr(d,0,1), 1 | 2);
`````` aptech
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