m/matlabcentral/fileexchange/27076-shuffle"><span style=' text-decoration: underline;'>Shuffle</span></a><span> as it is both faster and more memory efficient than the built-in function. Note that you need to enable this by setting </span><span style=' font-family: monospace;'>options.shuffle = true</span><span> in MISC SETTINGS in RECONSTRUCTION PROPERTIES.</span></div><div  class = 'S4'><span>If you NEED to use implementation 1 WITHOUT precomputation (not  recommended), then for Octave and MATLAB R2019b a