Editing Running angle

In [[mathematics]], the '''running angle''' is the angle of consecutive vectors <math>(Xt,Yt)</math> with respect to the [[Baseline (typography)|base line]], i.e.
: <math>\phi(t) = \arctan\left(\frac {\Delta Yt} {\Delta Xt} \right) .</math> 

Usually, it is more informative to compute it using a four-quadrant version of the [[arctan]] function in a mathematical software library.

== See also ==
* [[Differential geometry]]
* [[Polar distribution]]

[[Category:Penmanship]]

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