7)

Write a MATLAB program to fit an exponentially decaying signal. The signal (ydata) can be simulated using the following sequence of commands (the code below generates the signal and adds noise):

tdata=linspace(0,10,100); a=500; b=2; c=40; ydata=a*exp(-tdata/b)+c; sigma=30; % standard dev. of noise ydata=ydata+sigma*randn(size(ydata)); figure;plot(tdata,ydata,o-); 

You are allowed to use the following built-in MATLAB commands to fit the data: fit, fminsearch, fminbnd, fminunc, fmincon, lsqnonlin, lsqcurvefit. You are not allowed to use graphical user interfaces such as cftool .

Thank you!