DataFolder=''; %TODO: put the actual path to start browser DataFolder='C:\Users\sommeria\Documents\MATLAB_WORK\UVMAT_DEMO_SOURCES\UVMAT_DEMO03_PIVchallenge_2005C'; fileinput=uigetfile_uvmat('pick an input file',DataFolder); Data=nc2struct(fileinput); figure npy=numel(Data.coord_y); npx=numel(Data.coord_x); X=ones(npy,1)*Data.coord_x'; Sum=sum(Data.VMean,2); XMean=sum(X.*Data.VMean,2)./Sum; XMean=XMean*ones(1,npx); Xrms=sum(((X-XMean).*(X-XMean).*Data.VMean),2)./Sum; Xrm=sqrt(Xrms); plot(Data.coord_y(3:end-1),Xrms(3:end-1)) %0.024 y+0.14 % spread= sqrt(2*log(2))*0.024=0.028 %y0=-5.8;