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Calculates Average rate of change (AARC or AROC) without the compounded formula: (end_value / baseline_value)/(end_year - baseline_year)

Usage

calculate_aroc(baseline_year, baseline_value, end_year, end_value)

Arguments

baseline_year

year where the AARC starts

baseline_value

value at start_year

end_year

year where the AARC ends

end_value

value at end_year

Value

numeric with AARC

Details

This formula provides an absolute value change and not a proportional one like calculate_aarc. To forecast change it should be add to the baseline value: baseline_value + (aroc*(current_year - start_year))