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

This is used to output the projection calculated by principle component analysis

Glossary of keywords and components
The data to analyze can be the output from another analysis algorithm
USE_OUTPUT_DATA_FROM use the output of the analysis performed by this object as input to your new analysis object
Compulsory keywords
FILE the name of the file to output to
STRIDE ( default=0 ) the frequency with which to perform the required analysis and to output the data. The default value of 0 tells plumed to use all the data
SERIAL ( default=off ) do the calculation in serial. Do not use MPI

( default=off ) lower the memory requirements

FMT the format to use in the output file