Message-ID: <9269E6EB-9C8D-4AFE-8057-E63F0068D9F4@xs4all.nl>
Date: 2014-11-05T19:24:55Z
From: Berend Hasselman
Subject: loops in R
In-Reply-To: <1415194874494.80290@usc.edu>
On 05-11-2014, at 14:41, Noha Osman <nmo_138 at usc.edu> wrote:
> Hi Folks
>
> Iam a new user of R and I have a question . Hopefully anyone help me in that issue
>
>
> I have that dataset as following
>
> Sample Population Species Tissue R G B
> 1 Bari1_062-1 Bari1 ret seed 94.52303 80.70346 67.91760
> 2 Bari1_062-2 Bari1 ret seed 98.27683 82.68690 68.55485
> 3 Bari1_062-3 Bari1 ret seed 100.53170 86.56411 73.27528
> 4 Bari1_062-4 Bari1 ret seed 96.65940 84.09197 72.05974
> 5 Bari1_062-5 Bari1 ret seed 117.62474 98.49354 84.65656
> 6 Bari1_063-1 Bari1 ret seed 144.39547 113.76170 99.95633
>
> and I have 20 populations as following
>
> [1] Bari1 Bari2 Bari3 Besev Cermik Cudi Derici Destek Egil
> [10] Gunasan Kalkan Karabace Kayatepe Kesentas Ortanca Oyali Cultivated Sarikaya
> [19] Savur Sirnak
>
> I need to calculate mean and variance of each population using column [R] using for-loop
If I?m correct you asked an almost identical question Stackoverflow (http://stackoverflow.com/questions/26742023/how-can-i-use-loops-in-r).
You got all the answers you need.
Berend