[R] Splitting a data column randomly into 3 groups

[AbouEl-Makarim Aboueissa]

Sorry, please forget about it. I believe that I am very serious when I
posted my question.

with thanks
abou
______________________


*AbouEl-Makarim Aboueissa, PhD*

*Professor, Statistics and Data Science*
*Graduate Coordinator*

*Department of Mathematics and Statistics*
*University of Southern Maine*



On Thu, Sep 2, 2021 at 9:42 PM Avi Gross via R-help <r-help using r-project.org>
wrote:

> What is stopping you Abou?
>
> Some of us here start wondering if we have better things to do than
> homework for others. Help is supposed to be after they try and encounter
> issues that we may help with.
>
> So think about your problem. You supplied data in a file that is NOT in
> CSV format but is in Tab separated format.
>
> You need to get it in to your program and store it in something. It looks
> like you have 204 items so 1/3 of those would be exactly 68.
>
> So if your data is in an object like a vector or data.frame, you want to
> choose random number between 1 and 204. How do you do that? You need 1/3 of
> the length of the object items, in your case 68.
>
> Now extract the items with  those indices into say A1. Extract all the
> rest into a temporary item.
>
> Make another 68 random indices, with no overlap, and copy those items into
> A2 and the ones that do not have those into A3 and you are sort of done,
> other than some cleanup or whatever.
>
> There are many ways to do the above and I am sure packages too.
>
> But since you have made no visible effort, I personally am not going to
> pick anything in particular.
>
> Had you shown some text and code along the lines of the above and just
> wanted to know how to copy just the ones that were not selected, we could
> easily ...
>
>
> -----Original Message-----
> From: R-help <r-help-bounces using r-project.org> On Behalf Of AbouEl-Makarim
> Aboueissa
> Sent: Thursday, September 2, 2021 9:30 PM
> To: R mailing list <r-help using r-project.org>
> Subject: [R] Splitting a data column randomly into 3 groups
>
> Dear All:
>
> How to split a column data *randomly* into three groups. Please see the
> attached data. I need to split column #2 titled "Data"
>
> with many thanks
> abou
> ______________________
>
>
> *AbouEl-Makarim Aboueissa, PhD*
>
> *Professor, Statistics and Data Science* *Graduate Coordinator*
>
> *Department of Mathematics and Statistics* *University of Southern Maine*
>
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