	This is part of the mapping module
	It is only available if you configure PLUMED with ./configure –enable-modules=mapping . Furthermore, this feature is still being developed so take care when using it and report any problems on the mailing list.

Take an input path with frames that are not equally spaced and make the frames equally spaced

METRIC	the method to use for computing the displacement vectors between the reference frames
METRIC_COMPONENT	if the final action in your metric contains multiple components this keyword is used to specify the component that should be used
REFERENCE	labels for actions that contain reference coordinates for each point on the path
STRIDE	( default=1 ) the frequency with which to reparameterize the path
FIXED	( default=0 ) the frames in the path to fix
MAXCYLES	( default=100 ) number of cycles of the algorithm to run
TOL	( default=1E-4 ) the tolerance to use for the path reparameterization algorithm

DISPLACE_FRAMES

label of an action that tells us how to displace the frames. These displacements are applied before running the reparameterization algorith