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inanna
2004 Feb 27
4
question
...such cases
or I do something wrong?
> z1 = c(NA, "", 3, NA, "", 3)
> z2 = c("", "", 3, NA, 3, NA)
> cV = (as.character(z1)==as.character(z2))
> cV
[1] NA TRUE TRUE NA FALSE NA
>
> iFalse = (c(1:(length(z1))))[(cV==FALSE)]
> iNonNA = (c(1:(length(z1))))[(!(is.na(cV)))]
> iFalse
[1] NA NA 5 NA
>
> iNonNA
[1] 2 3 5
>
> iFalseFalse = intersect(iFalse, iNonNA)
> iFalseFalse
[1] 5
> i2 = (c(1:(length(z1))))[( (cV==FALSE)&&(!(is.na(cV))) )]
> i2
numeric(0)
>
--
Svetlana Eden Biostatistic...