On 26-03-2012, at 11:34, Ashish Agarwal wrote:
> On similar lines, how do I assign the position of the an occurence of a
> value say 7 in a data vector to another data vector?
>
>> nFields
> [1] 6 6 6 6 6 6 7 7 6 6 6 7 6 6 6 6
> I need the output data vector showing occurence of 7 as:
> [1] 7 8 12
>
> I tried following but both has errors
> xFields7 <- NULL
> for (i in 1:length(nFields)) {
> c(xFields7,ifelse(nFields[i] == 7,i,NULL)) -> xFields7
> }
>
> xFields7 <- NULL
> for (i in 1:length(nFields)) {
> if nFields[i] == 7 then c(xFields7,i) -> xFields7
> }
?which
Berend
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