The function invokes particular methods which depend on the class of the object (ie first argument).
x = rnorm(50,5,4) xSummary <- summary(x) xSummary
Min. 1st Qu. Median Mean 3rd Qu. Max. -4.963 3.434 5.706 5.800 8.119 16.140
For a data frame, you got to see the following for each variable:
exportFile <- file("C:/temp/Myfile.tsv",open="w") write.table(xSummary, sep="\t") close(exportFile)
# Load packages library(psych) # You can save the content of this function mySummaryTable = describe(myData)
The describeBy function reports basic summary statistics by a grouping variable.
- the grouping variable is some experimental variable (ie dependent variable)
- the data are to be aggregated for plotting.
Partly a wrapper of the describe function.
An alternative function statsBy returns a list of means, n, and standard deviations for each group.
for each group.
See also: R - Dplyr (Data Frame Operations) and the summarize function.