[R] Returning the coef from two coordinates

[Petr Savicky]

On Fri, Apr 27, 2012 at 02:08:09PM -0700, Hans Thompson wrote:
> I meant (1,1) as an (x,y) coordinate.  I am trying to find the function to
> return the coefficient of the line running through:
> 
> >B
>     x  y
> a  1  1
> 
> and all the points in:
> 
> >A
>      x   y  
> a  1   3
> b  2   2
> c  3   1

Hi.

If you want three coefficients, one for each point in A, then try

  C <- sweep(A, 2, B)
  C[, 2]/C[, 1]

  [1] Inf   1   0

Petr Savicky.