calpuff_13_pt_source_params: Set one or more CALPUFF point source parameters
In rich-iannone/PuffR: A set of tools to help with CALPUFF dispersion modelling.

This function validates and writes CALPUFF point source parameters.

calpuff_13_pt_source_params(calpuff_inp = "calpuff_template.txt",
  npt1 = NULL, iptu = NULL, nspt1 = NULL, npt2 = NULL,
  ptsource_name = NULL, ptsource_params = NULL, ptsource_zpltfm = NULL,
  ptsource_fmfac = NULL, downwash_output = NULL)

`calpuff_inp`	the absolute path and filename for the working CALPUFF input file.
`npt1`	the number of point sources.
`iptu`	the units used for line source emissions, where the possible selections are: (1) "g/s", (2) "kg/hr", (3) "lb/hr", (4) "tons/yr", (5) "Odour Unit * m^3/s", (6) "Odour Unit * m^3/min", and (7) "metric tons/yr".
`nspt1`	the number of source-species combinations with variable emissions scaling factors.
`npt2`	the number of point sources with variable location and emission parameters.
`ptsource_name`	a vector of assigned names for each point source.
`ptsource_params`	a list of point source parameters for each source in the order of: (1) x UTM coordinate (km), (2) y UTM coordinate (km), (3) stack height (m), (4) base elevation (m), (5) stack diameter (m), (6) exit velocity (m/s), (7) exit temperature (K), (8) building downwash computed (where 1 is yes, 0 is no), (9) emission rates for each species emitted from point source in units specified in the 'iptu' argument.
`ptsource_zpltfm`
`ptsource_fmfac`
`downwash_output`