| assignSymbLett {GCDkit} | R Documentation | 
Assigns plotting symbols to initial letters of the respective levels of the chosen label.
assignSymbLett(lab = NULL, display.legend = FALSE)
| lab | specification of the variable to be used for symbols assignment. See Details. | 
| display.legend | logical; should be the legend displayed? Batch mode only. | 
If called from in interactive mode (from GUI), the variable (sample names or label) can be 
selected using the function 'selectColumnLabel'.
In batch mode, 'lab' can be an integer (a sequence number of the 
column in the 'labels'). 
Alternatively, it can contain the full name of a column in 'labels'. 
See examples.
Sets 'leg.pch' to a sequence number of column in 'labels' that is 
to be used to build the legend; 'labels$Symbol' contains the  plotting 
symbols, which correspond to initial letters for the levels of the specified label.
Vojtěch Janoušek, vojtech.janousek@geology.cz
To display the current legend use showLegend. 
Symbols by a single label can be assigned by assignSymbLab, 
colours by assignColLab, symbols and colours by groups simultaneously 
by assignSymbGroup. Uniform colours or symbols are achieved by 
assign1symb and assign1col. Table of available plotting 
symbols is displayed by showSymbols and colours by showColours.
    sampleDataset("sazava")
    
    ## Not run: assignSymbLett()                      # Interactive mode
    
    assignSymbLett(2,display.legend=TRUE)           # Second column in labels 
    assignSymbLett("Locality",display.legend=TRUE)  # The same (here Locality)