Running Totals and Running Growth Rate

[BCNAV]

I have data like:

Day    Current    Previous    Growth

1      10          5          1.0

2      20         10          1.0

3      30                    15          1.0

etc.

I would like to add another variable that creates a running total (RT) and running growth rate:

Day    Current    Previous    Growth    RT_Curr  RT_Prev   RT_Growth 

1      10          5          1.0       10        5        1.0

2      20         10          1.0       30       15        1.0

3      30                    15          1.0       60       30        1.0

etc.

Is there an easy way to do this in SAS?  Datastep?

Thanks!

[PaigeMiller]

I can't determine from your example how running total growth is computed. Nevertheless, running totals are simple.

data want;
    set have;
    rt_curr+current;
    rt_prev+previous;
run;

[BCNAV · Accepted solution]

Totally forgot about that !!!  Thx!