swp_carbon_stockchange: Calculates changes in carbon stock from solid wood products....
In benjones2/WOODCARB3R: WOODCARB3R

Description Usage Arguments Value Examples

Calculates changes in carbon stock from solid wood products. Units are in Tg Carbon. For production approach, values correspond to 'Calculation$BY' in the spreadsheet. For stock change approach, values correspond to 'Calculation$H' in the spreadsheet.

swp_carbon_stockchange(years, approach = c("Production", "Stock Change"),
  decaydistribution = c("Exponential", "K=2", "K=10"),
  halflives = halfLives, fsp = fracstrpanels, fnsp = fracnonstrpanels,
  fsawn = fracsawnwood, swpdata, woodToCarbon = 4.535925e-07)

`years`	years to return carbon totals for
`approach`	approach type used to calculate
`decaydistribution`	type of decay distribution to use
`halflives`	data frame of half lives to use. Must have a column associated with each one of 13 end uses and half life values for 1900 until the maximum year of interest.
`fsp`	Fraction of structural panel products that go to each end use. Default can be substituted with data with a column for each end use and row for years from 1900 to latest year of interest.
`fnsp`	Fraction of non-structural panel products that go to each end use. Default can be substituted with data with a column for each end use and row for years from 1900 to latest year of interest.
`fsawn`	Fraction of sawnwood products that go to each end use. Default can be substituted with data with a column for each end use and row for years from 1900 to latest year of interest.
`swpdata`	Optional argument to provide swp production and trade time series for purposes of error analysis
`woodToCarbon`	Conversion factor to convert oven-dry tons of solid wood to Tg of Carbon.

A vector of swp carbon stock changes for 'years'

## Not run: 
swp_carbon_stockchange(1990:2000)
swp_carbon_stockchange(1950:1975, approach = "Stock Change", decaydistribution = "K=2")

## End(Not run)