Time-activity data analysis made easy. fvar4dat can add Gaussian noise to time-activity data: SD(t) = Sqrt( c * TAC(t) * Exp(lambda*t) / frame_length ) TAC_noisy(t) = TAC(t) + SD(t)*G(0,1) Input and output TAcs are assumed to be decay corrected.
If the output filename extension is *.sd or *.cv, then noise is not added but calculated values of SD or CV (to be added) are written instead.

Usage:
fvar4dat <Datafile> <Proportionality constant c> <Isotope> <Output file>

Options:
-S[eed]=<seed for random number generator>
Computer clock is used by default
-sec
If datafile does not contain time unit, times are by default assumed to be in minutes. Use this option to set time unit to sec.
-R=<nr of repeats>
Specified number of output files (*_NNNN.*) with different set of noise are created
-h or --help
Print this message and exit
--version or --build
Print software build information and exit
--silent
Program works silently, printing only error and warning messages
--verbose
Program prints lots of information about what it is doing.

The license of this software is Freeware, you can free download and free use this calculator software.