Six types of special values may be displayed. |
...and 0 (unknown) | Data not available. |
<0.5 and 0 0 (negligible) | More than zero but less than half of the unit used. |
0 and 0- (zero) | An actual null value. |
F (FAO estimate) | Data estimated from available source of information or calculation based on specific assumptions. |
R (repetition) | Repetition of data previously reported. |
W (wrong unit) | Data for the record is in a unit that does not match the standard dataset unit. |
Other explanations |
no (number) | Indicates that data unit is number. |
t (tonnes =1000 kg) | Indicates that data unit is tonne. |
Tip:
when calculating, the program will preserve special values to the fullest extent possible, e.g. the sum of two unknown values is an unknown value, the sum of two negligible values a negligible value. In complex cases, all flags are removed and the result of the calculation is considered a "normal" number.
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