and columns to species j for each <span class="math inline">\(\alpha_{ij}\)</span> coefficient. The diagonal correspond to the intraspecific cases. In order to showcase other capabilities of the package, we include in this example the effect of a covariate over the fitted lambda and alpha parameters. This covariate, soil salinity, is also included as a dataset in the package (see vignette 2). We consider that the covariate has a linear effect in both the modification of lambda and alpha parameters.</p>
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