[Rd] as.numeric - Possible error (PR#870)

maechler@stat.math.ethz.ch maechler@stat.math.ethz.ch
Fri, 9 Mar 2001 10:08:38 +0100 (MET)


>>>>> "harald" == harald fekjar <harald.fekjar@basalmed.uio.no> writes:

    harald> Full_Name: Harald Fekjśr
    harald> Version: 1.22
    harald> OS: Windows 
    harald> Submission from: (NULL) (158.36.132.220)


    harald> Dear R developers

    harald> Is this done with purpose...:

    harald> In R I get:
    harald> ---
    >> as.numeric(" ")
    harald> [1] 0 

    >> as.integer(" ")
    harald> [1] 0 
    harald> ---

    harald> While in the same in S-PLUS returns:
    harald> ---
    >> as.numeric(" ")
    harald> [1] NA 

    >> as.integer(" ")
    harald> [1] NA
    harald> ---

    harald> For my applications, the later (S-PLUS) definitely makes most
    harald> sense, but you my have some good reasons for your choose?
    harald> (Anyway it is quite dangers with these differences when porting
    harald> applications).

Note that it's also for other ``blank like'' strings :

 > sapply(c("", " ", "\t", "\n", "\r"), as.numeric)
       \t \n \r 
  0  0  0  0  0 

Without having the time currently to investigate your suggested change,
I tend to agree.


    harald> Thanks for a wonderful program!

you're welcome!

    harald> Harald Fekjśr, Oslo, Norway

Martin Maechler <maechler@stat.math.ethz.ch>	http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum  LEO D10	Leonhardstr. 27
ETH (Federal Inst. Technology)	8092 Zurich	SWITZERLAND
phone: x-41-1-632-3408		fax: ...-1228			<><



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