camino_selectshells: Wrapper for Camino 'selectshells' function
In muschellij2/rcamino: Port of the Camino Software

Performs the Camino selectshells function

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camino_selectshells(infile, schemefile, max_bval = NULL,
  min_bval = NULL, output_root = tempfile(),
  max_unweighted_bval = NULL, remove_zero = FALSE, verbose = TRUE)

`infile`	Input 4D file to select shells
`schemefile`	Scheme file with gradient information
`max_bval`	Maximum b-value to include in the output. Default infinity (include all b-values). In the same units as the scheme file.
`min_bval`	Minimum b-value to include in the output. Default 0. In the same units as the scheme file. b=0 measurements are treated as a special case and are not removed unless the `remove_zero` is `TRUE`.
`output_root`	Root of output files, selected shells of DWI data are output along with the associated scheme file. Output file format will be the same as the input (NIFTI or raw).
`max_unweighted_bval`	Maximum b-value to include as an unweighted measurement. Some imaging schemes have a small non-zero b-value for the unweighted measurements. With this option, any b-value less than or equal to the specified value are treated as b=0.
`remove_zero`	If `TRUE`, b=0 measurements are not selected. By default they are selected even if a minimum b-value is specified.
`verbose`	Print diagnostic messages