orthogonal/perpendicular distance from regression line

Hi there,
I am trying to measure orthogonal/perpendicular distances from  
regression
lines (i.e. the shortest distance from a given point to my  
regression line).
As it sounds rather easy (basically just an orthogonal/perpendicular
residual) I hoped that there was some function in R that can do  
that. All
efforts so far remained unsuccessful, however.
Does anybody know?
Thnx and cheers,
Philipp
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Hi there,
I am trying to measure orthogonal/perpendicular distances from regression
lines (i.e. the shortest distance from a given point to my regression line).
As it sounds rather easy (basically just an orthogonal/perpendicular
residual) I hoped that there was some function in R that can do that. All
efforts so far remained unsuccessful, however.
Does anybody know?

You could do this with [1], but if you are hoping to learn something
statistical by doing this you should probably reconsider, because the
regression line residuals are minimized along the dependent variable
axis,

On Fri, 20 Feb 2009, GAF wrote:

Hi there,
I am trying to measure orthogonal/perpendicular distances from regression
lines (i.e. the shortest distance from a given point to my regression
line).
As it sounds rather easy (basically just an orthogonal/perpendicular
residual) I hoped that there was some function in R that can do that. All
efforts so far remained unsuccessful, however.
Does anybody know?

You could do this with [1], but if you are hoping to learn something
statistical by doing this you should probably reconsider, because the
regression line residuals are minimized along the dependent variable axis,
and if the coordinate system is rotated (that is, you look at
deviation from the regression line to the points along a different
direction) then the residuals on that regression line will no longer be
minimized.

[1] http://mathworld.wolfram.com/Point-LineDistance2-Dimensional.html

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