[R] Question on Variabeles
Uwe Ligges
ligges at statistik.tu-dortmund.de
Sun Mar 8 19:20:08 CET 2009
David1234 wrote:
> Hi everyone,
>
> Im quite new to R an I have the following Question:
>
>
> I would like to define Variables which I can add and multiply etc. and that
> R can simplyfy the terms.
>
> The variables should stand for integers.
> For example I would like to have an entry in an array with variable z
> and if I add b+z the field should now contain 2z+b. Or if the field
> contains 1 and I add z the field should contain 1+z.
>
> How can I solve this problem?
>
> I tried to set z=integer and then for example matrix[1,1]=i
> But this does only work if I assign a value for z first.
>
> I am very grateful for any help.
>
>
> Thank you very much!
>
> David
R is not an algebra system but a system for numerical computations. You
can write a function that represents (i.e. generates and returns) your
matrix and uses its arguments to fill different elements of that matrix.
Best wishes,
Uwe
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