| statsByGroup {GCDkit} | R Documentation | 
Calculates simple descriptive statistics for individual columns of the given data matrix; optionally this can be done for each of the groups separately.
    statsByGroup(dataset = WR, groups = NULL)
| dataset | numeric data matrix. | 
| groups | a vector, in which is specified, for each sample, a group it belongs to. | 
The function returns a list containing the calculated statistical parameters 
respecting the current grouping. The statistical summary involves number of 
observations, missing values, mean, standard deviation, minimum, 25% quartile, 
median (= 50% quartile), 75% quartile and maximum. This is a core function 
invoked both by summarySingle and summarySingleByGroup.
| results | a matrix with the means and single standard deviations of both variables for each of the individual groups | 
Vojtěch Janoušek, vojtech.janousek@geology.cz
    sampleDataset("blatna")
    groupsByLabel("Suite")
    
    statsByGroup()
    statsByGroup(WR[,LILE])