Description of numeric variables
Describes a numeric variable.
describe.numeric(x,varname="",
num.desc=c("mean","median","var","sd","valid.n"))x |
A numeric vector. |
varname |
The variable name to display. |
num.desc |
The names of the functions to apply to the vector. |
describe.numeric displays the name of the vector and the results of the functions whose names are passed in num.desc. Note that any functions that are called by describe.numeric must have an na.rm argument, even if it is a dummy.
The vector of values returned from the functions in num.desc.
Jim Lemon
x<-rnorm(100)
# include a function that calculates the "smoothness" of a vector
# of numbers by calculating the mean of the absolute difference
# between each successive value - all values equal would be 0
smoothness<-function(x,na.rm=TRUE) {
if(na.rm) x<-x[!is.na(x)]
xspan<-diff(range(x))
return(mean(abs(diff(x))/xspan,na.rm=TRUE))
}
describe(x,num.desc=c("mean","median","smoothness"),xname="x")
# now sort the values to make the vector "smoother"
describe(sort(x),num.desc=c("mean","median","smoothness"),xname="x")Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.