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 How to use IF and OR together		  New Topic  Reply to Topic
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sivanml

1 Posts
Posted - 08/04/2015 :  01:07:34 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hi,
I have a data set in columns (say) A, B, C. I want to perform a calculation such that if the data in either of col(A) or col(B) is negative, then multiply the data in col(c) by (-1). Otherwise read the col(c) data as it is. The result is required in another col (D). How do I go about it in Orgin 8?

Siva

jasonzhao

China
262 Posts
Posted - 08/04/2015 :  02:30:57 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hello,

Please right click the column D and select Set Column Values to open the Set Values dialog, then use the formula below, click OK to apply:


((col(A)>0)&&(col(B)>0))?col(C):-col(C)



Best regards!
Jason
OriginLab Technical Service
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Hideo Fujii

USA
1582 Posts
Posted - 08/04/2015 :  12:09:44 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Siva,

Just a minor correction, it should be: 
((col(A)>=0)&&(col(B)>=0))?col(C):-col(C)
or, followed your original logical formulation, the conditional formula may be:
((col(A)<0)||(col(B)<0))?-col(C):col(C)

--Hideo Fujii
OriginLab

P.S. With no logical operator, try 
2*(sign((sign(col(A))+1))*sign((sign(col(B))+1))-0.5)*col(C)
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