the same number of metabolites and reactions.</span>
0010 <span class="comment">%</span>
0011 <span class="comment">% Arguments:</span>
0012 <span class="comment">%  output1: matrix or tensor from 1st model variant (output from es_sample_multiple.m)</span>
0013 <span class="comment">%  output2: matrix or tensor from 2nd model variant (output from es_sample_multiple.m)</span>
0014 <span class="comment">%  n_per:   # of samples in permutation test</span>
0015 <span class="comment">%  fdr:     false discovery 