The RATS Software Forum

writ wrote:Hello all,

I am having some difficulties figuring out RECTANGULAR arrays and it seems like I end up using a number of do loops where more efficient methods should be available.

1. Can I do a vertical concatenation of two RECTANGULAR[series] arrrays? If A is (1,6) and B is (1,6), how do I make an array C that is (2X6) and contains all of the elements of A and B? It seems to me that:

compute C = A~~B

might work but either I have the syntax wrong or I do not understand this operator.

writ wrote: 2. How do I set a single row of a RECTANGULAR[series] array? Suppose I have a RECTANGULAR[series] array A that is (6,6) and I have a VECTOR[series] B that is of dimension 6. Is there an efficient way to set A(3,*) = B?

do i=1,%cols(A)
   set a(3,i) = b(i)
end do i

writ wrote: 3. How do I extract a single row of a RECTANGULAR[series] array? For example, suppose I have a RECTANGULAR[series] array A that is (6,6) and I want to look at all of the series contained in row 3. Is there an efficient way to extract this row as either a RECTANGULAR or a VECTOR?

dec vect[series] b(%cols(a))
do i=1,%cols(a)
   set b(i) = a(3,i)
end do i

writ wrote: This data type seems like a very powerful feature but I feel that I am missing some fairly basic concepts about how to use it. Any help would be much appreciated!

Thank you,

Geoff