[R] Splitting a data column randomly into 3 groups
@boue|m@k@r|m1962 @end|ng |rom gm@||@com
Fri Sep 3 03:51:20 CEST 2021
Sorry, please forget about it. I believe that I am very serious when I
posted my question.
*AbouEl-Makarim Aboueissa, PhD*
*Professor, Statistics and Data Science*
*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>
> 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
> 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
> *AbouEl-Makarim Aboueissa, PhD*
> *Professor, Statistics and Data Science* *Graduate Coordinator*
> *Department of Mathematics and Statistics* *University of Southern Maine*
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