fit_pbr - tpcclib 0.7.8 © 2022 by Turku PET Centre
Non-linear fitting of a function to sampled plasma-to-blood ratio data.
Usage: fit_pbr [Options] datafile [parfile]
Options:
-HCT=<Haematocrit>
Constrain haematocrit to specified value; fitted by default.
-min=<OLS|LAD>
Sum-of-squares (OLS) is minimized by default, but optionally
sum of absolute deviations (LAD) can be selected.
-w1
All weights are set to 1.0 (no weighting); by default, weights in
data file are used, if available.
-wf
Weight by sampling interval.
-k=<value>
Parameter k is constrained to given value.
-lim[=<filename>]
Specify the constraints for function parameters;
This file with default values can be created by giving this option
as the only command-line argument to this program.
Without file name the default values are printed on screen.
-svg=<Filename>
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,
possibly also weights as last column.
Example:
fit_pbr -svg=ia765pbrat.svg ia765pb.rat ia765pbrat.fit
See also: fit_bpr, tacinv, tacblend, b2rbc, bpr2cpr, fit_sigm, fit_hiad
Keywords: curve fitting, input, blood, plasma, modelling, simulation