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== Normalisation ==
== Normalisation ==
−
As show in the previous section the Olive Oils category can be split into 3 subgroups, based on how the nutritional values are reported:
+
As show in the previous section the Olive Oils category can be split into 3 (or more) subgroups, based on how the nutritional values are reported on the package:
* per 100g
* per 100g
* per 100ml
* per 100ml
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If we know how the nutritional data for a product is reported, we can normalise that data. And with the normalised data we have a consistent dataset, which can be used to get the real nutritional values.
If we know how the nutritional data for a product is reported, we can normalise that data. And with the normalised data we have a consistent dataset, which can be used to get the real nutritional values.
+
=== Categorisation ===
=== Categorisation ===
The first step to categorise each product into each of the groups.
The first step to categorise each product into each of the groups.