geomaterials_opticalsign {OpenMindat}

retrieve the geomaterials that match an given optical signs.

Description

: Queries the geomaterials match an given optical signs.

Usage

geomaterials_opticalsign(signs, ...)

Arguments

signs

list of the signs(string or null). sign for uniaxial and biaxial minerals: +;-;+/- .Please refer to the details.

...

Further named parameters.Other optional arguments.

Details

This function releated to the field "opticalsign" of geomaterials. Optical sign: single choice (Enum): "+", "+/-", "-"

Value

df, a data frame of geomaterials

Examples

## Not run: 
df <-geomaterials_opticalsign("-")

## End(Not run)