plotsample displays some noisy sample data. Try to fit the data with
showfit, following the instructions given in the command window. The
sample data is chosen randomly among the 9 predefined plots described
below.
plotsample is also available from the item 'Plot Sample' of the EzyFit
menu (see efmenu).
plotsample(OPT) specifies the sample plot:
'power': noisy power law
'linear': noisy data to be fitted by a linear function
'damposc': damped oscillation
'cste': noisy constant
'exp': noisy exponential decay
'hist': histogram of 1000 realizations of a random variable
'hist2': histogram with two gaussian peaks.
'powco': noisy power law with an exponential cut-off.
'poly2': 3 curves to be fitted by a 2nd order polynomial fit
plotsample(N) specifies the number of the sample plot (1 to 8).
plotsample(...,'fit') also displays the fit.
[X,Y] = plotsample(...) also returns the sample data (this is
equivalent to plotsample; [X,Y] = pickdata;).
Example:
plotsample power fit
(it shows a power law and fits it).
See Also
showfit, selectfit, fit, pickdata, efmenu.