fit_bpr - tpcclib 0.8.0 © 2023 by Turku PET Centre

Non-linear fitting of a function to sampled blood-to-plasma ratio data.
Usage: fit_bpr [Options] datafile fitfile
     Select the function; default is IGV.
     Fit also delay time, or, set delay time (0 by default).
     Constrain baseline level to specified value; fitted by default.
 -w1 All weights are set to 1.0 (no weighting); by default, weights in
     data file are used, if available.
     Weight by sampling interval.
 -fast or -safe
     Speed up the fitting but increase the chance of failure, or
     increase the reliability at the cost of computing time.
     Sum-of-squares (SS) is minimized by default, but optionally
     sum of absolute deviations can be selected.
     Fitted and measured TACs are plotted in specified SVG file.
 -h, --help
     Display usage information on standard output and exit.
 -v, --version
     Display version and compile information on standard output and exit.
 -d[n], --debug[=n], --verbose[=n]
     Set the level (n) of debugging messages and listings.
 -q, --quiet
     Suppress displaying normal results on standard output.
 -s, --silent
     Suppress displaying anything except errors.
Datafile must contain at least 2 columns, sample times and ratios;
DFT file (1) can include also weights.
Program writes the fit start and end times, nr of points, WSS/n,
and parameters of the fitted function to the FIT file (2).
     fit_bpr -model=igv -svg=ia765bprat.svg ia765bp.rat
See also: fit2dat, avgfract, b2plasma, bpr2cpr, tacinv, taccat, tacblend
Keywords: curve fitting, input, blood, plasma, modelling, simulation