[Rd] stem does not give a correct answer (PR#9359)

2006-11-12 Thread mgkim 
Full_Name: Myung Geun Kim
Version: 2.4.0
OS: Window XP
Submission from: (NULL) (210.110.8.105)


For the data c1 of size 14, stem provides the following result.

**
c1
 [1] 14 39 70 11 38 20 37 15 41 74 74 34 48 51
ZZangistem(c1)

  The decimal point is 1 digit(s) to the right of the |

  0 | 145
  2 | 04789
  4 | 181
  6 | 044

**
However, stem does not give a correct answer, for example 34, 74, etc.

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Re: [Rd] stem does not give a correct answer (PR#9359)

2006-11-12 Thread Berwin A Turlach 
G' day Myung,

 MGK == mgkim  [EMAIL PROTECTED] writes:

MGK For the data c1 of size 14, stem provides the following result.

MGK **
 c1
MGK [1] 14 39 70 11 38 20 37 15 41 74 74 34 48 51
ZZangi stem(c1)

MGK The decimal point is 1 digit(s) to the right of the |

MGK 0 | 145
MGK 2 | 04789
MGK 4 | 181
MGK 6 | 044

MGK **
MGK However, stem does not give a correct answer, for example 34, 74, etc.

No bug, it is just the scale to which stem decides to plot by
default.  The line 

4 | 181

should give a clue that this summarises 41, 48 and 51.  Since the data
is so sparse only even leading numbers are used.  Try:

 dat - c(14, 39, 70, 11, 38, 20, 37, 15, 41, 74, 74, 34, 48, 51)
 stem(dat)

  The decimal point is 1 digit(s) to the right of the |

  0 | 145
  2 | 04789
  4 | 181
  6 | 044

 stem(dat, scale=2)

  The decimal point is 1 digit(s) to the right of the |

  1 | 145
  2 | 0
  3 | 4789
  4 | 18
  5 | 1
  6 | 
  7 | 044

Cheers,

Berwin

== Full address 
Berwin A Turlach  Tel.: +61 (8) 6488 3338 (secr)   
School of Mathematics and Statistics+61 (8) 6488 3383 (self)  
The University of Western Australia   FAX : +61 (8) 6488 1028
35 Stirling Highway   
Crawley WA 6009e-mail: [EMAIL PROTECTED]
Australiahttp://www.maths.uwa.edu.au/~berwin

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