IMSL_STATDATA

Syntax | Return Value | Arguments | Keyword | Discussion | Example | Version History

The IMSL_STATDATA function retrieves commonly analyzed data sets.

Note
This routine requires an IDL Advanced Math and Stats license. For more information, contact your ITT Visual Information Solutions sales or technical support representative.

Syntax

Result = IMSL_STATDATA(choice)

Return Value

An array containing the desired data set is returned.

Arguments

choice

Data set indicator. See Table 25-7 for a list of values for choice.

Table 25-7: choice Values 

choice
Numberof Rows
Number of Columns
Description of Data Set
1
16
7

Longley

2
176
2

Wolfer sunspot

3
150
5

Fisher iris

4
144
1

Box and Jenkins

Series G

5
13
5

Draper and Smith

Appendix B

6
197
1

Box and Jenkins

Series A

7
296
2

Box and Jenkins

Series J

8
100
4

Robinson Multichannel

Time Series

9
113
34

Afifi and Azen

Data Set A

Keyword

DOUBLE

If present and nonzero, double precision is used.

Discussion

The IMSL_STATDATA function retrieves a standard data set frequently cited in statistics text books or in this manual. Table 25-8 gives the references for each data set:

Table 25-8: Standard Data Set References 

choice
References
1

Longley (1967)

2

Anderson (1971, p. 660)

3

Fisher (1936); Mardia et al. (1979, Table 1.2.2)

4

Box and Jenkins (1976, p. 531)

5

Draper and Smith (1981, pp. 629–630)

6

Box and Jenkins (1976, p. 525)

7

Box and Jenkins (1976, pp. 532–533)

8

Robinson (1967, p. 204)

9

Afifi and Azen (1979, pp. 16–22)

Example

In this example, IMSL_STATDATA is used to copy the Draper and Smith (1981, Appendix B) data set into X. 

x = IMSL_STATDATA(5) 
PM, x 
 
   7.00000      26.0000      6.00000      60.0000      78.5000 
   1.00000      29.0000      15.0000      52.0000      74.3000 
   11.0000      56.0000      8.00000      20.0000      104.300 
   11.0000      31.0000      8.00000      47.0000      87.6000 
   7.00000      52.0000      6.00000      33.0000      95.9000 
   11.0000      55.0000      9.00000      22.0000      109.200 
   3.00000      71.0000      17.0000      6.00000      102.700 
   1.00000      31.0000      22.0000      44.0000      72.5000 
   2.00000      54.0000      18.0000      22.0000      93.1000 
   21.0000      47.0000      4.00000      26.0000      115.900 
   1.00000      40.0000      23.0000      34.0000      83.8000 
   11.0000      66.0000      9.00000      12.0000      113.300 
   10.0000      68.0000      8.00000      12.0000      109.400

Version History

6.4

Introduced