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## Syntax

**DYNAmics****ANALysis POWEr { dynamics-power-statement } END**is invoked from the main level of X-PLOR.**dynamics-power-statement :==**-
**trajectory-statement**- defines the input data; see Section 12.1.3.
**BACK=logical**- performs Fourier
back-transformation on power spectrum to
obtain the vector autocorrelation function (default: FALSE).

(12.2) **CLENgth=realps**- provides length of correlation function in units of psec; it affects only the output file (default: 10).
**COUTput=filename**- writes the correlation function to the specified file.
**PLENgth=real**- provides the length of the power spectrum in units of psec; it affects only the output file, not the calculation (default: 1000).
**POUTput=filename**- puts the power spectrum into the specified file.
**POWER-2=integer**- is an optional specification of a power of 2 for the FFT (default: 1).
**PSKIp=int**- is the skip value for the printout of the power spectrum. It does not affect the calculation. If pskip is zero, no power spectrum is written (default: 1).
**TRIM=logical**- trims the first (largest) peak from the power spectrum if TRIM is TRUE; if a correlation function is calculated later and the peak was at 0, this is equivalent to shifting the long time limit of the correlation function to 0 ( ) (default: FALSE).
**WINDow=( real real )**- sets to zero everything in the power spectrum that is outside the window defined by the two values in units of psec (default: (0,1000)).

*Xplor-NIH 2024-09-13*