The files in this folder contain the data from Experiments 29, 30, and 31.  It is in a binary format and can be extracted from each file with the Matlab code at the end of this document.  

The files contain either the the U or V (cartesian) velocities (cm/s) of each experiment on a 128x128 grid for each frame with a temporal separation of 0.05 seconds.  The limits of both axes (x and Y) are [-29.7cm 29.7cm].  Once a file is extracted each column contains the information for one instant and must be reshaped to associate it with a physical space. An example is below.



%% EXAMPLE MATLAB CODE to extract data:
    U29_fid = fopen('exp29_U.mtx','rb');
    N = fread(U29_fid,[1 2],'ulong');
    U29 = fread(U29_fid,N,'float32');
    fclose(U29_fid);

%% EXAMPLE MATLAB CODE to view velocities for frame 200:
% include code from previous example
    V29_fid = fopen('exp29_V.mtx','rb');
    N = fread(V29_fid,[1 2],'ulong');
    V29 = fread(V29_fid,N,'float32');
    fclose(V29_fid);
    
    loc = -29.7:(2*29.7)/127:29.7;
    [X,Y] = meshgrid(loc,-loc);
    
    U = reshape(U29(:,200),128,128);
    V = reshape(V29(:,200),128,128);
    
    figure(1); clf;
    quiver(X,Y,U,V);
    axis square;
