R help - Apr 2016 - [FORGED] 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.

cheers,

Rolf Turner

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

Please specify your goal in the oracle/psql analytical functions you know or
specify what you mean by nonlinear correlation

Sent from my iPhone
> On Apr 9, 2016, at 6:09 AM, Muhammad Bilal <Muhammad2.Bilal at
live.uwe.ac.uk> wrote:
> 
> No its not. I am doing all these experiments for my own learning purpose. I
am Oracle SQL & PLSQL programmer and  I can do these things with Oracle
analytical functions.
> 
> However at present I am keen to learn R, with no other interest right now.
> 
> Thanks
> --
> Muhammad Bilal
> Research Assistant and PhD Student,
> Bristol Enterprise, Research and Innovation Centre (BERIC),
> University of the West of England (UWE),
> Frenchay Campus,
> Bristol,
> 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.
> 
> cheers,
> 
> Rolf Turner
> 
> --
> Technical Editor ANZJS
> Department of Statistics
> University of Auckland
> Phone: +64-9-373-7599 ext. 88276
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