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 at r-project.org> On Behalf Of AbouEl-Makarim
Aboueissa
Sent: Thursday, September 2, 2021 9:30 PM
To: R mailing list <r-help at 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