Supplement 1. MATLAB code used in the calculation of asymmetry values.

<h2>File List</h2><blockquote> <p><a href="Asymmetry.m" target="_top">Asymmetry.m</a> -- main script <br> <a href="corr.m" target="_top">corr.m</a> -- supplementary script<br> <a href="intimp.m" target="_top">intimp.m</a> -- supplementary script <br> <a href="quant2bin.m" target="_top">quant2bin.m</a> -- supplementary script<br> <a href="sortmat.m" target="_top">sortmat.m</a> -- supplementary script</p> </blockquote><h2>Description</h2><blockquote> <p>This Supplement contains a Matlab script used to calculate asymmetry values. Asymmetry.m needs four supplementary scripts ( corr.m, intimp.m, quant2bin.m, sortmat.m).</p> <p> Asymmetry.m generates the following outputs: total degree each row (1st column); frequency of interactions each row (2nd column); sum dependences each row (3rd column); asymmetry value for each row (4th column). Finally, it gives the correlation values between abundance and asymmetry.</p> </blockquote>