[R] Query about finding correlations

From: lalitha viswanath <lalithaviswanath_at_yahoo.com>
Date: Wed, 02 May 2007 08:55:35 -0700 (PDT)


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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