error message: vector subtracted from scalar

[Lassebn]

Hello

I have written the following program in Eviews7:

Code: Select all

!rows = @rows(z_dsf_standard) vector (!rows) z_HJ_sd for !i=1 to 3 vector (2) z_r_!i z_r_!i (1) = z_afkast (!i,1) ' Her fanger jeg ite periodes aktieafkast z_r_!i (2) = z_afkast (!i,2) ' rf z_hj_sd (!i) = (z_dsf_standard (!i))^2 - (@inverse(@transpose(z_r_!i)*z_r_!i)*(@transpose(z_r_!i)*(z_dsf_standard (!i)) ))*z_r_!i next

But when I try to run the program it comes up with an error message saying that I am trying to subtract a vector from a scalar which I can not see that I am doing!!
As you can see z_r_!i is a 2x1 vector and z_dsf_standard is a 130x1 vector but I have picked out the i'th entry of this vector....

Thanks,
Lasse

[EViews Gareth]

The ith element of a vector is a scalar...

[Lassebn]

The ith element of a vector is a scalar...

Hey EviewsGareth, thanks for the reply.

Yes i know. I have written

z_dsf_standard (!i))^2 - (@inverse(@transpose(z_r_!i)*z_r_!i)*(@transpose(z_r_!i)*(z_dsf_standard (!i)) ))*z_r_!i

The second term consists of a 1x2 vector * 2x1 vector * 1x2 vector * scalar * 2x1 vector which should result in a scalar, but Eviews says, that I am trying to subtract a vector from a scalar...

[EViews Gareth]

EViews doesn't know that the result of the matrix algebra is a scalar.

Store the result of that algebra in a temporary vector, then use the 1st element.

[Lassebn]

Thanks a lot.

Now i have written the following

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!rows = @rows(z_dsf_standard) vector (!rows) z_HJ_sd vector (!rows) z_mellemregning for !i=1 to 3 vector (2) z_r_!i z_r_!i (1) = z_afkast (!i,1) ' Her fanger jeg ite periodes aktieafkast z_r_!i (2) = z_afkast (!i,2) ' rf z_mellemregning (!i) = @inverse(@transpose(z_r_!i)*z_r_!i)*@transpose(z_r_!i)*(z_dsf_standard (!i))*z_r_!i z_hj_sd (!i) = (z_dsf_standard (!i))^2 - z_mellemregning (!i) next

but now Eviews says that i am using a nonnumeric argument in the line saying

z_mellemregning (!i) = @inverse(@transpose(z_r_!i)*z_r_!i)*@transpose(z_r_!i)*(z_dsf_standard (!i))*z_r_!i

I can not see what is wrong!!

[EViews Gareth]

You have an errant space

[Lassebn]

EViews doesn't know that the result of the matrix algebra is a scalar.

Store the result of that algebra in a temporary vector, then use the 1st element.

How do I even calculate the matrix algebra when i can not make the calculations "inside" the vector where I want to store the results?
Bare with me, this is my first attempt at writing a programme

[EViews Gareth]

Code: Select all

matrix temp = @inverse(@transpose(z_r_!i)*z_r_!i)*@transpose(z_r_!i)*(z_dsf_standard (!i))*z_r_!i !temp2 = temp(1,1) z_hj_sd (!i) = (z_dsf_standard (!i))^2 - !temp2

[Lassebn]

Thank you so much for your help and expert knowledge :D