calcplacediu: Total carbon placed in use in od tons of wood fiber
In benjones2/WOODCARB3R: WOODCARB3R

Corresponds to B3147 column in SW Calc P and SW Calc spreadsheet for Production and Stock Change approach respectively.

1
2
3

calcplacediu(Years = 1900:2020, approach = c("Production", "Stock Change"),
  total = TRUE, fsp = fracstrpanels, fnsp = fracnonstrpanels,
  fsawn = fracsawnwood, swpdata)

`Years`	years to calculate carbon placed in use for
`approach`	The approach type to use. Fractions dont change but inflow does
`total`	Whether to return total placed in use or seperate it by end uses.
`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