**DYNAmics****ANALyze CORRelation { dynamics-time-correlation-statement } END**is invoked from the main level of X-PLOR.**dynamics-time-correlation-statement :==**-
**trajectory-statement**- defines the input data; see Section 12.1.3.
**FUNCtion=ACMSDVAC**- specifies the type of correlation function to be evaluated.
**LENGth=real**- gives the length of correlation function in psec.
**NORMalize=logical**- normalizes a correlation such that c(0)=1.0.
**OUTPut****filename**writes the correlation function to the specified file.**SPECies=selection**- gives an average (center of mass) over selected atoms.
**SHELl { shell-statement } END**- provides an additional selection based on dynamical position.

**shell-statement:==**-
**trajectory-statement****CUTHigh=real****CUTLow=real****MODE=SELFSIMUltaneously****ORIGin=vector**