You can use the [R programming language](http://en.wikipedia.org/wiki/R_%28programming_language%29).

Suppose the data is in a file named `datafile`:

 $ cat datafile
 1
 2
 4

Invoke non-interactive R using `Rscript`:

 $ Rscript -e 'd<-scan("datafile", quiet=TRUE); \
 cat(min(d), max(d), median(d), mean(d), sep="\n")'
 1
 4
 2
 2.333333

You can write an R script file:

 #! /usr/bin/env Rscript
 d<-scan("stdin", quiet=TRUE)
 cat(min(d), max(d), median(d), mean(d), sep="\n")

Note the `"stdin"` which is a special filename to read from stdin.

And pipe the data to the R script:

 $ cat datafile | ./mmmm.r
 1
 4
 2
 2.333333

Also works for floating points:

 $ cat datafile
 1.1
 2.2
 4.4
 $ cat datafile | ./mmmm.r
 1.1
 4.4
 2.2
 2.566667

Read the fine R manuals at http://cran.r-project.org/manuals.html.

Unfortunately the full reference is only available in PDF. Another way to read the reference is by typing `?topicname` in the prompt of an interactive R session.