R help - Aug 2016 - problem concernig Survsplit, package survival

Thanks for bringing this issue in the book's description of survSplit() to
my attention. It seems the change to the behavior of survSplit() was introduced
in survival version 2.39-2. Up to (including) version 2.38-3, no formula was
required if arguments 'end' and 'event' were specified.

A corrected pdf of the chapter is available at
http://dwoll.de/r/gddmr/09_survival.pdf

Daniel Wollschlaeger

On August 19, 2016 4:21:31 AM PDT, "Vinzenz V?lkel via R-help"
<r-help at r-project.org> wrote:
>Dear R-help-community,
>
> 
>
>I hope, that?s the appropiate channel to post a quastion?
>
> 
>
>For some days I have been struggling with a problem concerning the
>?survSplit?-function of the package ?survival?. Searching the internet
>I
>have found a pretty good -German- description of Daniel Wollschl?ger
>describing how to use survSplit:
>
> 
>
>(https://books.google.de/books?id=9G4oBgAAQBAJ
><https://books.google.de/books?id=9G4oBgAAQBAJ&pg=PA345&lpg=PA345&dq=daniel+
>wollschl%C3%A4ger+survsplit&source=bl&ots=ajPgInB83d&sig=noQIAXMWe6oQJ-LwsTC
>kroWdwHQ&hl=de&sa=X&ved=0ahUKEwiqwoX8q83OAhVlM5oKHSMGDrEQ6AEIHjAA#v=onepage&
>q=daniel%20wollschl%C3%A4ger%20survsplit&f=false>
>&pg=PA345&lpg=PA345&dq=daniel+wollschl%C3%A4ger+survsplit&source=bl&ots=ajPg
>InB83d&sig=noQIAXMWe6oQJ-LwsTCkroWdwHQ&hl=de&sa=X&ved=0ahUKEwiqwoX8q83OAhVlM
>5oKHSMGDrEQ6AEIHjAA#v=onepage&q=daniel%20wollschl%C3%A4ger%20survsplit&f=fal
>se
>
> 
>
>Mr. Wollschl?ger also provides the dataset, all of the code he used and
>an
>excerpt of his output:
>
> 
>
> 
>
>> library(survival) # f?r survSplit()
>
>> dfSurvCP <- survSplit(dfSurv, cut=seq(30, 90, by=30),
end="obsT",
>
>+ event="status", start="start", id="ID",
zero=0)
>
># sortiere nach Beobachtungsobjekt und linken Intervallgrenzen
>
>> idxOrd <- order(dfSurvCP$ID, dfSurvCP$start)
>
>> head(dfSurvCP[idxOrd, ], n=7)
>
>obsT    status sex      X                     IV        start     ID
>
>1          30        0          f           -1.3130607     A         0
>1
>
>181      60        0          f           -1.3130607     A         30
>1
>
>361      63        1          f           -1.3130607     A         60
>1
>
>10        11        1          f           -1.2282824     A         0
>10
>
>100      27        1          m         -0.1018403     B         0
>100
>
>101      30        0          m         -0.4079027     B         0
>101
>
>281      42        1          m         -0.4079027     B         30
>101
>
> 
>
> 
>
>Unfortunaltely when I tried to copy Mr. Wollschl?gers operations using
>his
>very dataset, RStudio just returned the following error-message:
>
> 
>
>> dfSurvCP2 <-
>survSplit(dfSurv,cut=seq(30,90,by=30),end="obsT",event="status",start="start
>",id="ID",zero=0)
>
>Error in formula.default(eval(parse(text = x, keep.source >FALSE)[[1L]]))
:
>
>
>  invalid formula
>
> 
>
>I tried to figure out what?s wrong, but so far didn?t find any
>solutions? I
>would be very glad if anyone could help me out here.
>
> 
>
>vhfv
>
> 
>
>
>	[[alternative HTML version deleted]]
>
>
>
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>
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