LinearFit_s.m
e1aafe9a98d8shear_version

LinearFit_s.m
View Options

			function [gamma,fit] = LinearFit_s(time,Na00abs)
			% LinearFit computes the growth rate and frequency from the time evolution of Napj
			% - adapted from MOLI (B.J. Frei)
			%

			% ... amplitude ratio method

			% We compute the mean of the growth rate over a time window
			% Trun = time(end);
			% if tstart == -1
			% [~,Tstart_ind] = min(abs(time - 0.5*Trun));
			% else
			% [~,Tstart_ind] = min(abs(time - max(tstart,time(1))));
			% end
			%
			% if tend == -1
			% Tend_ind = numel(time)-1;
			% else
			% [~,Tend_ind] = min(abs(time - min(tend,Trun)));
			% end
			%


			Na00absshifted = circshift(Na00abs,-1); % ... shift by -1 the time position
			gammaoft = log(Na00absshifted(1:end-1)./Na00abs(1:end-1))./squeeze(diff(time')); % ... evaluate growth rate

			% Get gamma
			% gamma = mean(gammaoft(Tstart_ind:Tend_ind-1)); % ... take the mean of gamma over the time window
			gamma = mean(gammaoft); % ... take the mean of gamma over the time window

			% Return gamma(t) for amplitude ratio method
			fit.gammaoft = gammaoft;

			end % ... end function