_______________________________________________________________________________________
Note: This e-mail is subject to the disclaimer contained at the bottom of this message. _______________________________________________________________________________________ Hi, I came across some rather unexpected behaviour the other day with assigning names and lists. Here's an example. > z <- list(aaa=1, bbb=2) > z $aaa [1] 1 $bbb [1] 2 Note that z has members named "aaa" and "bbb". Now: > names(z$a) <- "X" > z $aaa [1] 1 $bbb [1] 2 $a X 1 I would have expected that trying to name z$a would either give an error (because z doesn't have an element "a") or would cause z$aaa to be modified (due to partial name matching). I didn't expect that a new list member would be created. I've checked that this is consistent across SPlus 2000, SPlus 7, and R 2.2 for Windows. Can someone give an explanation for why this is happening? -- Hong Ooi Senior Research Analyst, IAG Limited 388 George St, Sydney NSW 2000 (02) 9292 1566 _______________________________________________________________________________________ The information transmitted in this message and its attachments (if any) is intended only for the person or entity to which it is addressed. The message may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information, by persons or entities other than the intended recipient is prohibited. If you have received this in error, please contact the sender and delete this e-mail and associated material from any computer. The intended recipient of this e-mail may only use, reproduce, disclose or distribute the information contained in this e-mail and any attached files, with the permission of the sender. This message has been scanned for viruses with Symantec Scan Engine and cleared by MailMarshal. ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
