STMLP
Prints a stem‑and‑leaf plot.
Required Arguments
X —Array of length NOBS containing the data. (Input)
UNITS — Size of the increment on the stem. (Input)
If UNITS is set so small that the length of the stem is more than 60 lines, STMLP will use a UNITS such that the stem will be no longer than 60 lines. However, if UNITS is a negative integer, STMLP will use the absolute value of UNITS, even if the stem would become very long. A common value for UNITS is 10.
TITLE — CHARACTER string containing the plot title. (Input)
Optional Arguments
NOBS — Number of observations. (Input)
Default: NOB = size (X,1).
FORTRAN 90 Interface
Generic: CALL STMLP (X, UNITS, TITLE [, …])
Specific: The specific interface names are S_STMLP and D_STMLP.
FORTRAN 77 Interface
Single: CALL STMLP (NOBS, X, UNITS, TITLE)
Double: The double precision name is DSTMLP.
Description
Routine STMLP prints a stem‑and‑leaf display. The user can specify that the plot be longer than one page, but the default maximum is 60 lines. A plus sign (+) at the end of a line indicates that there are too many data points to fit within the width specifications. A scale marked in units of 10 is printed below the stem‑and‑leaf display.
Comments
1. Workspace may be explicitly provided, if desired, by use of S2MLP/DS2MLP. The reference is:
CALL S2MLP (NOBS, X, UNITS, TITLE, MAXWID, IWK, WK)
The additional arguments are as follows:
MAXWID — Page width. (Input)
MAXWID = 78 when STMLP is called.
IWK — Work vector of length MAXWID.
WK — Vector of length NOBS. (Output)
WK contains the sorted data from X.
2. Informational error
Type | Code | Description |
|---|
3 | 4 | TITLE is too long to fit into the page width determined by the routine PGOPT. TITLE is truncated from the right side. |
3. Default page width is 78. The user may change it by calling the routine
PGOPT (see
Chapter 19, "Utilities") in advance.
Example
This example prints a stem‑and‑leaf plot consisting of 27 data points ranging from –21.8 to 106.5.
USE STMLP_INT
IMPLICIT NONE
INTEGER NOBS
PARAMETER (NOBS=27)
!
REAL UNITS, X(NOBS)
!
DATA X/6.0, 106.5, 34.0, 88.1, 89.0, 0.3, 0.7, 4.0, 4.0, 5.0, &
56.0, 62.8, 99.0, 4.0, 15.0, 76.0, 7.6, 101.5, 33.0, 91.0, &
91.0, -6.3, -21.8, 0.0, 8.99, 5.5, 6.9/
!
UNITS = 10.
CALL STMLP (X, UNITS, 'Stem and leaf plot')
!
END
Output
Stem and leaf plot
Each line on the stem represents 1.0 unit(s).
For example: 1 25
2 2
represents the data 12., 15., and 22.
-2.2
-1
-0 6
0 001444566789
1 5
2
3 34
4
5 6
6 3
7 6
8 89
9 119
10 27
Published date: 03/19/2020
Last modified date: 03/19/2020
