About XomicsToModel presentMetabolites.weights

[Juan Sepulveda]

Hello,

I want to use the XomicsToModel function to generate models. I have metabolomics data to identify the present metabolites but would like to use the presentMetabolites.weights parameter to prioritize some metabolites over others. I have two questions:

1. Where are these weights used in the function?

2. What type of values should I use for the weights? Do higher weights promote metabolite presence? Does the actual value matter, or is the rank order the main contributor? Can I use negative values?

Thanks,

Juan