rmti_write_variables: Write MT3DMS variables Internal function used in the...
In rogiersbart/RMT3DMS: Pre- and post-processing of MT3DMS & MT3D-USGS files

Write MT3DMS variables Internal function used in the rmt_write_* functions for writing single line datasets

rmti_write_variables(
  ...,
  file,
  append = TRUE,
  width = 10,
  format = "fixed",
  integer = FALSE,
  iprn = -1
)

`width`	numeric vector with the character widths for each variable. If a single value, it is repeated.
`format`	either `'fixed'` or `'free'`. Fixed format assumes fixed width character spaces for each value as determined by the width argument
`integer`	logical; should all values be converted to integers? MT3D does not allow for exponents in integer values
`iprn`	ignored