A subset of Control Reference Material (CRM) data from NGR surveys undertaken in 2000 and 2001.
A data frame with 97 observations on the following 2 variables.
Unique identifiers are present in the data frame, use
dimnames(crm.test)[] to access or display them.
a code indicating the particular CRM analysed. A factor variable with levels:
the copper determinations, mg/kg.
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
Internal Geological Survey of Canada files.