calculateEle71: Calculate Element 71

In SWS-Methodology/faoswsAupus: Package to perform the AUPUS calculation.

Description

This function calculates element 71 (from initial existence).

Usage

calculateEle71(data, aupusParam)

Arguments

data	The AUPUS node dataset, typically as produced by buildNodes.
aupusParam	A list of running parameters to be used in pulling the data. Typically, this is generated from getAupusParameter (see that function for a description of the required elements).

Details

Element 71 is only computed for a few commodity types: 57, 58, 59, 60, and 61. For the last three types, the formula is short: element 71 = element 161 - element 11 (i.e. Final Existence minus Initial Existence). For the first two types, the computation is element 71 = element 51' + element 61 - element 91 - element 101 - element 121 - element 131 - element 141 - element 151.

Note: The documentation aupus_code_analysis.pdf has a typo. It does not mention how commodity type 57 should be handled, but after a conversation with Nick it was confirmed that commodity type 57 should be handled in the same way as commodity type 58.

Value

This function returns a list (of length 2) of integer vectors containing the row numbers of observations which were updated (the first vector when a value was computed for commodity type 58, the second for when the value was computed for commodity types 59, 60, or 61). However, it also has a side effect: rows within the passed data.table ("data") have element 63's value and symbol updated.

SWS-Methodology/faoswsAupus documentation built on May 9, 2019, 11:45 a.m.