Import data

What you can do, how, correct syntax for functions…

Funzioni trigonometriche di matlabhanno in input angoli in radianti.

Conversione gradi-radianti:

xrad=x*2*pi/360xrad2=deg2rad(x)

Matrices and vectors:

Is1: 1x20 vettore rigaMatrice: A=[Is1; Is2; Is3] dimensione 3X20B=[Is1’ Is2’ Is3’] dimensione 20x3

A==B’ apice: trasposizione

IsMEDIA=mean([Is1; Is2; Is3]) 1x20IsMEDIA=mean([Is1' Is2' Is3’]’) 1x20IsMEDIA=mean([Is1' Is2' Is3'],2) 20x1IsMEDIA=mean([Is1' Is2' Is3']) 1x3

Err=(max(A)-min(A))/2

Plotting data

figure(1); scatter(xrad,Is1);hold on;scatter(xrad,Is2);hold on;scatter(xrad,Is3)

figure(1); plot(xrad,IsMEDIA,’o’) errorbar(xrad,IsMEDIA,Err, ’.’)

Fitting data: cftool

FitSave to workspace it creates three objectsfittedmodel =

General model:fittedmodel(x) = a*cos(x-b)^2 +cCoefficients (with 95% confidence bounds):a = 1.012 (0.969, 1.054)b = -0.01514 (-0.03805, 0.007769)c = 0.004618 (-0.02402, 0.03326)

Fittedmodel can be used as a function:

x=linspace(-0.5,3.5,1000)f=fittedmodel(x)Figure(1);hold on;plot(x,f)

figure(1);hold on; fplot(@(x)fittedmodel(x),[-0.8 3.8])

Specific rotation