[Rscript] difficulty passing named arguments from commandline

# - Rscript ./netCDF.stats.to.stdout.r netcdf.fp="./GEIA_N2O_oceanic.nc" var.name="emi_n2o"
# fails

# + Rscript ./netCDF.stats.to.stdout.r 'netcdf.fp="./GEIA_N2O_oceanic.nc"' 'var.name="emi_n2o"'
# succeeds

The trailling arguments to Rscript, generally read by
commandArgs(TRUE), come into R as a vector of character strings.
Your script can interpret those character strings in many ways.
The [script linked above] processed them all with

   eval(parse(text=arg[i]))

so all the arguments had to be valid R expressions: strings must be
quoted, unquoted things are treated as names of R objects, slash
means division, "=" and "<-" mean assignment, etc.

If that is a problem, don't use parse() to interpret the strings;
use sub() or strsplit() to extract substrings and do what you want
with them. (This is somewhat safer than using eval(parse(text=))
because it can do less.)