[R] Insert value in a Vector Alternately

jim holtman jholtman at gmail.com
Thu Feb 19 13:47:41 CET 2009


How about this:

> dat<-c(0.00377467,0.00377467,0.00377467,0.00380083,0.00380083,0.00380083,0.00380959,
+ 0.00380959,0.00380959,0.00380083,0.00380083,0.00380083)
> dat[seq(1, by=3, to=length(dat))] <- 0
> dat
 [1] 0.00000000 0.00377467 0.00377467 0.00000000 0.00380083 0.00380083
0.00000000 0.00380959 0.00380959 0.00000000 0.00380083
[12] 0.00380083
>


On Thu, Feb 19, 2009 at 1:47 AM, Gundala Viswanath <gundalav at gmail.com> wrote:
> Hi,
>
> I have a vector that look like this:
>
>> dat
>             V1         V2         V3         V4         V5         V6
>  0.00377467 0.00377467 0.00377467 0.00380083 0.00380083 0.00380083
>             V7         V8         V9        V10        V11        V12
>  0.00380959 0.00380959 0.00380959 0.00380083 0.00380083 0.00380083
>
>
> what I want to do is to insert 0 (zero) for every 3 position yielding:
>
> V1   V2              V3                V4             V5    V6
>    V7               V8
> 0  0.00377467 0.00377467 0.00377467 0  0.00380083 0.00380083 0.00380083
> V9   V10              V11                V12             V13    V14
>        V15             V16
> 0 0.00380959 0.00380959 0.00380959 0 .00380083 0.00380083 0.00380083
>
>
> Is there a quick way to do it in R?
>
> - Gundala Viswanath
> Jakarta - Indonesia
>
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> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?



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