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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