stem.leaf {aplpack} | R Documentation |
Creates a classical ("Tukey-style") stem-and-leaf display.
stem.leaf(data, unit, m, Min, Max, rule.line = c("Dixon", "Velleman", "Sturges"), style = c("Tukey", "bare"), trim.outliers = TRUE, depths = TRUE, reverse.negative.leaves = TRUE, na.rm = FALSE)
data |
a numeric vector. |
unit |
leaf unit, as a power of 10 (e.g., 100 , .01 );
if unit is missing unit is choosen by stem.leaf . |
m |
number of parts (1, 2, or 5) into which each stem will be separated;
if m is missing the number of parts/stem
(m ) is choosen by stem.leaf . |
Min |
smallest non-outlying value; omit for automatic choice. |
Max |
largest non-outlying value; omit for automatic choice. |
rule.line |
the rule to use for choosing the desired number of lines
in the display; "Dixon" = 10*log10(n); "Velleman" = 2*sqrt(n);
"Sturges" = 1 + log2(n); the default is "Dixon" . |
style |
"Tukey" (the default) for "Tukey-style" divided stems;
"bare" for divided stems that simply repeat the stem digits. |
trim.outliers |
if TRUE (the default), outliers are placed on LO and
HI stems. |
depths |
if TRUE (the default), print a column of "depths" to the left of the
stems; the depth of the stem containing the median is the stem-count enclosed in
parentheses. |
reverse.negative.leaves |
if TRUE (the default), reverse direction the leaves on negative
stems (so, e.g., the leaf 9 comes before the leaf 8, etc.). |
na.rm |
if TRUE 'NA' values are removed otherwise exchanged by mean |
Unlike the stem
function in the base
package, this function produces
classic stem-and-leaf displays, as described in Tukey's Exploratory Data Analysis.
The computed stem and leaf display is printed out.
Invisibly stem.leaf
returns the stem and leaf
display as a list containing the elements
info
(legend), stem
(display as character vecter), lower
(very small values) ,
and upper
(very large values).
Peter Wolf, the code has been slightly modified by John Fox jfox@mcmaster.ca with the original author's permission, help page written by John Fox, the help page has been slightly modified by Peter Wolf.
Tukey, J. Exploratory Data Analysis. Addison-Wesley, 1977.
stem.leaf(co2)