[R] [FORGED] Generating random data with non-linear correlation between two variables

Muhammad Bilal Muhammad2.Bilal at live.uwe.ac.uk
Sat Apr 9 11:57:13 CEST 2016

Hi Rolf Turner,

Firstly, I really appreciate your help.

Is it possible to give the number of entries I need so that rnorm function generates only that number of rows?

Also is it possible to generate the points with spread randomly such that they don't overlap each other too much.

Many Thanks and 

Kind Regards
Muhammad Bilal
Research Assistant and PhD Student,
Bristol Enterprise, Research and Innovation Centre (BERIC),
University of the West of England (UWE),
Frenchay Campus,
BS16 1QY

muhammad2.bilal at live.uwe.ac.uk

From: Rolf Turner <r.turner at auckland.ac.nz>
Sent: 09 April 2016 04:46
To: Muhammad Bilal
Cc: r-help at r-project.org
Subject: Re: [FORGED] [R] Generating random data with non-linear correlation between two variables

On 09/04/16 06:57, Muhammad Bilal wrote:
> Hi All,
> I am new to R and don't know how to achieve it.
> I am interested in generating a hypothetical dataframe that is consisted of say two variables named v1 and v2, based on the following constraints:
> 1. The range of v1 is 500-1500.
> 2. The mean of v1 is say 1100
> 3. The range of v2 is 300-950.
> 4. The mean of v2 is say 400
> 5. There exists a positive trend between these two variables, meaning that as v1 increases, v2 be also increase.
> 6. But the trend should be slightly non-linear. i.e., curved line.
> Is it possible to automatically generate through functions like rnorm.
> Any help will be highly appreciated.

This sounds to me very much like a homework problem.  We don't do
people's homework for them on this list.


Rolf Turner

Technical Editor ANZJS
Department of Statistics
University of Auckland
Phone: +64-9-373-7599 ext. 88276

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