Hi Fahim,
This should achieve what you require:
VECTOR var = v1 TO v6 .
LOOP #n = 1 To 6.
IF (var(#n) GE 0) pos_score = SUM(pos_score, var(#n)) .
COMPUTE abs_score = SUM(abs_score, ABS(var(#n))) .
IF (var(#n) LE 0) neg_score = SUM(neg_score, var(#n)) .
END LOOP .
EXECUTE .
Cheers,
Jason
On 8/26/06, Fahim Jafary <
[hidden email]> wrote:
> I have a dataset which records ECG changes in variables v1 to v6 as
> positive and negative numbers as well as zeros (if there is no change).
>
> I want to be able to
>
> 1. Add the positive numbers from v1 to v6 to get a cumulative "score",
> ignoring the negative values (so, for values 1, 2, 1, -2, 1, -3 I should
> get a "score" of 5)
> 2. Add the positive AND negative numbers from v1 to v6 to get a second
> cumulative "score" but IGNORING the negative or positive sign (so for
> values 1, 2, 1, -2, 1, -3 I should get a "score" of 10)
> 3. Add the negative numbers from v1 to v6 to get a third "score" but
> IGNORING the positive values (so for values 1, 2, 1, -2, 1, -3 I should
> get a score of 5).
>
> Can someone help me with the syntax on this one. I'll be very grateful
>
> Fahim H. Jafary
> Aga Khan University Hospital
> Karachi, Pakistan
>
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