Dear all,

I would like to apply a function to two vectors 

For example,

A<-c(NA,1,2,3,NA)
B<-6:10

I would like C to be equal to A but if any A element is NA that
corresponding c element is equal to B, i.e.

C = c(6,1,2,3,10)

Please note that this is a simplified example and the real vectors are
large so I would like to avoid loop as much as possible. Thank you 


Best Regards,

Suphajak Ngamlak
Equity and Derivatives Trading
Phatra Securities Public Company Limited
Tel: +662-305-9179   
Email: suphajak@phatrasecurities.com



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