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* '''Similar ingredients''' - some ingredients are very similar from a nutritional point of view. These ingredients have a high correlation (> 0.9). These ingredients should be handled as one ingredient. The fitting approach can not distinguish between these ingredients;
 
* '''Similar ingredients''' - some ingredients are very similar from a nutritional point of view. These ingredients have a high correlation (> 0.9). These ingredients should be handled as one ingredient. The fitting approach can not distinguish between these ingredients;
 
* '''Maximum number of ingredients''' - if a free fit is done, then the maximum number of ingredients needed is 7, for 7 nutrients. It will be a system of 7 equations with 7 unknowns. If we you use the forced origin fit, we could get more ingredients mathematically, but il will not have any meaning;
 
* '''Maximum number of ingredients''' - if a free fit is done, then the maximum number of ingredients needed is 7, for 7 nutrients. It will be a system of 7 equations with 7 unknowns. If we you use the forced origin fit, we could get more ingredients mathematically, but il will not have any meaning;
* '''Constraints''' - it seems necessary to introduce constraints in order to find the best solution. Need to investigate how these can be expressed in R.
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* '''Constraints''' - These are really required to get a good coverage of all ingredients, whilst also getting good results.
       
[[Category:Recipe]]
 
[[Category:Recipe]]
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