# [R] Query about finding correlations

Stefan Grosse singularitaet at gmx.net
Wed May 2 18:43:41 CEST 2007

```I am sorry if I misinterpreted this but this questions looks/looked very
like a very basic one about statistical inference... (have a look at the
Manuals/contributed documentation e.g. Faraway)

Lalitha Viswanath wrote:
> Hi
> This is not a homework assignment :)
> Me and my manager are trying to understand the problem better. In the
> meanwhile, we thought we would post the problem on this forum to seek
> some input from statisticians who possibly do this kind of analyses
> everyday and hence are possibly more proficient with R and/or any
> recommended methodologies.
>
> Lalitha
>
> On 5/2/07, *Stefan Grosse* <singularitaet at gmx.net
> <mailto:singularitaet at gmx.net>> wrote:
>
>
>     lalitha viswanath wrote:
>     > Hi
>     > I have a dataframe which has 3 columns of numeric data
>     > A,B,C each of which has been obtained independent of
>     > the other.
>     >
>     > We are trying to find out, which of A or B cause C
>     > i.e. We are hypothesising that C is the effect and
>     > either A or B, not both is the cause.
>     >
>     > i.e. A causes C and this cause-effect relationship
>     > explains B.
>     >
>     > The data for A contains more noise than that for B.
>     > We are working with around 1000 points.
>     >
>     > I would greatly appreciate any inputs on the best
>     > statistcal approach to tackle this problem.
>     > I am thinking that we can find correlation
>     > coefficients between A and C, and between B and C, but
>     > I am not sure this answers the question.
>     > Also we do not know whether the correlation between
>     > them is linear or non linear.
>     >
>     > Thanks
>     > Lalitha
>     >
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