Description

A subset of Control Reference Material (CRM) data from NGR surveys undertaken in 2000 and 2001.

Usage

Format

A data frame with 97 observations on the following 2 variables. Unique identifiers are present in the data frame, use dimnames(crm.test)[[1]] to access or display them.

CRM

a code indicating the particular CRM analysed. A factor variable with levels: STSD-1, STSD-2, STSD-3, STSD-4, TILL-4, X, Y, and Z.

Cu

the copper determinations, mg/kg.

Details

The ‘value’ of CRM is used to select the CRM data to be displayed, either by creating a specific subset, e.g., using gx.subset, or using the R construct Cu[CRM=="X"] in the call to function crm.plot.

Source

Internal Geological Survey of Canada files.