calc {GCDkit} | R Documentation |
Calculates a single numeric variable and appends it to the data.
calc()
The formula can invoke any combination of names of existing numerical columns,
with the constants, brackets, arithmetic operators +-*/^
and R functions.
See calcCore
for a correct syntax.
If the result is a vector of the length corresponding to the number of the samples
in the system, the user is prompted for the name of the new data column.
Unless a column with the specified name already exists or the given name is empty,
the newly calculated column is appended to the data in memory ('WR
').
results |
numerical vector with the results |
Modifies, if appropriate, the numeric matrix 'WR
'.
Vojtěch Janoušek, vojtech.janousek@geology.cz
## Not run: # examples of valid formulae.... (Na2O+K2O)/CaO Rb^2 log10(Sr) mean(SiO2)/10 # ... but this command is in fact a simple R shell - # meaning lots of fun for power users! summary(Rb,na.rm=T) cbind(SiO2/2,TiO2,Na2O+K2O) cbind(major) hist(SiO2,col="red") boxplot(Rb~factor(groups)) # possibilities are endless plot(Rb,Sr,col="blue",pch="+",xlab="Rb (ppm)",ylab="Sr (ppm)",log="xy") ## End(Not run)