geomaterials_field_exists: retrieve the geomaterials records of empty or not empty of a given field.
Description
: Queries the list of geomaterials with an empty or not empty of a given field.
Usage
geomaterials_field_exists(fieldname,bexists,...)
Value
df, a list of geomaterials
Arguments
fieldname
string
bexists
bool
...,
Further named parameters.Other optional arguments.
Details
This function releated to all the fields of geomaterials.
e.g. meteoritical_code_exists.Meteoritical code exists. Include non-empty (true) / include empty only (false)
retrieve the geomaterial list with an empty or not empty of a given field.