Hi all,
I would appreciate your help on the following.
I have two data sets (arrays)
Data X
V1 | V2 | V3 | V4 | V5 |
2 | 1 | 4 | 6 | 3 |
4 | 5 | 2 | 1 | |
7 | 8 | 2 | ||
3 | 9 | |||
5 |
and Data Y
A1 | A2 | A3 | A4 | A5 |
2 | 1 | 3 | 5 | 6 |
I would like to fill the missing lower part of the matrix by successively multiplying the previous non-missing value of Data X with the elements of the Data Y
i.e. for the last observation 10= 5*2 (A1), 10= 10 * 1 (A2), 30=10* 3 (A3) , 150 = 30 * 5 (A4) and 900 = 150 * 6(A5)
Consequently column V_New will be created due to final multiplication.
So Data Z is the desired one
V1 | V2 | V3 | V4 | V5 | V_New |
2 | 1 | 4 | 6 | 3 | 18 |
4 | 5 | 2 | 1 | 5 | 30 |
7 | 8 | 2 | 6 | 30 | 180 |
3 | 9 | 9 | 27 | 135 | 810 |
5 | 10 | 10 | 30 | 150 | 900 |
Thank you in advance.
Nik
I like such kind of questions.
data v; infile cards expandtabs missover; input V1-V5; cards; 2 1 4 6 3 4 5 2 1 7 8 2 3 9 5 ;;;; run; Data a; infile cards expandtabs; input A1-A5; cards; 2 1 3 5 6 ;;;; run; data want; if _n_ eq 1 then set a; set v; array x{*} v1-v5 v_new; array y{*} a1-a5; do i=1 to dim(x)-1; temp=x{i}*y{i}; if missing(x{i+1}) then x{i+1}=temp; end; drop temp i a:; run;
Xia Keshan
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