Changes

Jump to navigation Jump to search
133 bytes added ,  12:34, 23 December 2020
Line 34: Line 34:     
=== Nutritional values check===
 
=== Nutritional values check===
A next step to correct wrong nutritional data, I started by looking at the [https://world.openfoodfacts.org/cgi/search.pl?action=process&tagtype_0=categories&tag_contains_0=contains&tag_0=olive%20oils&sort_by=unique_scans_n&page_size=20&axis_x=fat&graph_title=Olive%20oils%20(fat%20percentage)&graph=1 fat percentage].
  −
There are 6 products with more than 100% fat, so lets correct those first. It easier to list those with a [https://world.openfoodfacts.org/cgi/search.pl?action=process&tagtype_0=categories&tag_contains_0=contains&tag_0=olive%20oils&nutriment_0=fat&nutriment_compare_0=gt&nutriment_value_0=100&sort_by=unique_scans_n&page_size=20&axis_x=fat query] and correct them. For these products the wrong data has been added. One product had a fat content of 101g though.
  −
   
[[File:OliveOilsFatPercentageDistribution.jpg|thumb]]
 
[[File:OliveOilsFatPercentageDistribution.jpg|thumb]]
 +
A next step to find and correct wrong nutritional data, I started by looking at the [https://world.openfoodfacts.org/cgi/search.pl?action=process&tagtype_0=categories&tag_contains_0=contains&tag_0=olive%20oils&sort_by=unique_scans_n&page_size=20&axis_x=fat&graph_title=Olive%20oils%20(fat%20percentage)&graph=1 fat percentage].
 +
There were 6 products with more than 100% fat, which is clearly impossible. These can be listed with this search [https://world.openfoodfacts.org/cgi/search.pl?action=process&tagtype_0=categories&tag_contains_0=contains&tag_0=olive%20oils&nutriment_0=fat&nutriment_compare_0=gt&nutriment_value_0=100&sort_by=unique_scans_n&page_size=20&axis_x=fat query]. These products had just the wrong data entered. Although one product actually had a fat content of 101g.
 +
The next step is to look at fat percentages that were too low.
   −
The next edit round looks at fat percentages lower than 88%.
+
The graph shows the final distribution of fat percentages. Note that the distribution has two peaks, one around 100% and one around 90%. The reason for this will be investigated further on.
 
  −
The final result of the fat percentage distribution.
  −
Note that the distribution has two peaks, one around 100% and one around 90%. It seems that some producers assume that their olive oils consist of 100% fat and others really have it measured.
     −
Now that I did the fat percentage, I realised that I have to go through all nutritional values and look at values that are out if the ordinary.
+
As the fat percentage shows, we need to check all nutritional values and check if anything is out of the ordinary. For this we need to define an envelope of accepted values. The products that have all values will not be checked any further. Products with one or more values outside this envelope need to be checked by hand.
    
=== Other checks ===
 
=== Other checks ===
3,393

edits

Navigation menu