[R] list to data.frame

[Benjamin.STABLER@odot.state.or.us]

as.data.frame() does not work but as.data.frame.list() does.  Any thoughts?

as.data.frame(time.by.orig)
Error in as.data.frame.default(time.by.orig) : 
        can't coerce array into a data.frame

as.data.frame.list(time.by.orig)
-Works fine

-----Original Message-----
From: Richards, Tom [mailto:richards at upci.pitt.edu]
Sent: Thursday, December 19, 2002 10:24 AM
To: STABLER Benjamin
Subject: RE: [R] list to data.frame


It's because there is no list method for data.frame(), but there is a method
called as.data.frame.list, and thus as.data.frame(time.by.orig) should work
(I haven't tried).

Tom Richards

> -----Original Message-----
> From: Benjamin.STABLER at odot.state.or.us
> [mailto:Benjamin.STABLER at odot.state.or.us]
> Sent: Thursday, December 19, 2002 1:24 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] list to data.frame
> 
> 
> R Help-
> 
> I have a list of 102 vectors all of the same type and length called
> time.by.orig.  I can't data.frame(time.by.orig) but I can
> data.frame(time.by.orig[1:length(time.by.orig)]).  Why is 
> this?  Thanks for
> your help. 
> 
> str(time.by.orig)
> List of 102
>  $ 1  : num [1:102]  1.34 17.39 14.36 14.22  7.56 ...
>  $ 2  : num [1:102] 17.5  0.7 17.7 12.4 10.4 ...
>  $ 3  : num [1:102] 14.063 17.568  0.754  8.065 15.100 ...
>  $ 4  : num [1:102] 13.940 12.423  7.546  0.766 14.977 ...
>  $ 100: num [1:102]  7.722 10.400 15.049 14.915  0.467 ...
>  $ 101: num [1:102]  5.68 13.99 13.90 13.77  4.01 ...
>  $ 102: num [1:102]  6.67 11.86 14.88 14.75  1.68 ...
>  ......
>  - attr(*, "dim")= int 102
>  - attr(*, "dimnames")=List of 1
>   ..$ : chr [1:102] "1" "2" "3" "4" ...
> 
> 
> > data.frame(time.by.orig)
> Error in as.data.frame.default(x[[i]], optional = TRUE) : 
>         can't coerce array into a data.frame
> 
> > data.frame(time.by.orig[1:length(time.by.orig)])
>  -Works fine
> 
> 
> Benjamin Stabler
> Transportation Planning Analysis Unit
> Oregon Department of Transportation
> Salem, OR 97301 USA
> 
> -----Original Message-----
> From: Deepayan Sarkar [mailto:deepayan at stat.wisc.edu]
> Sent: Thursday, December 19, 2002 9:42 AM
> To: Nolwenn Le Meur; r-help at stat.math.ethz.ch
> Subject: Re: [R] lattice and display
> 
> 
> On Thursday 19 December 2002 08:33 am, Nolwenn Le Meur wrote:
> > Hi,
> >
> > I have just started using lattice and it looks great. But I 
> already have 3
> > questions about xyplot display.
> >
> --------------------------------------------------------------
> -------------
> >- ---------------------------------
> > 1.I would like to create two differeny xyplot with 
> different color to
> > identify my different groups but I have trouble applying colors.
> > Here are the scripts
> >
> >  xyplot(resultdata$Y~resultdata$X ,
> > data=resultdata,groups=resultdata$Block, panel="panel.xyplot",
> >  panel.groups="panel.xyplot",
> >  xlab="X",ylab="Y",pch="*",
> >  col.groups=trellis.par.get("superpose.symbol")$col[1:6],cex=2,
> >  key=list(space="right",
> >  points=list(pch="*",
> > 	     col=trellis.par.get("superpose.symbol")$col[1:6]),
> >  text=list(paste("Block",1:6)))
> >  )
> 
> This is supposed to be called like
> 
> 
> xyplot(Y~X, data = resultdata, 
>        groups = Block, 
>        xlab="X", ylab="Y",
>        pch="*",
>        key=list(space="right",
>                 points=list(pch="*",
>  	        col=trellis.par.get("superpose.symbol")$col[1:6]),
>                 text=list(paste("Block",1:6))))
> 
> There's no argument called col.groups, and the panel function 
> you meant to
> use 
> was panel.superpose, not panel.xyplot (which you don't have 
> to specify 
> explicitly since it's the default).
> 
> > xyplot(resultdata$Y~resultdata$X |resultdata$Block, data=resultdata,
> >  xlab="X",ylab="Y",
> > col.groups=trellis.par.get("superpose.symbol")$col[1:6],cex=2,
> >  key=list(space="right",
> >  points=list(pch=trellis.par.get("superpose.symbol")$pch[1:6],
> > 	     col=trellis.par.get("superpose.symbol")$col[1:6]),
> >  text=list(paste("Block",1:6)))
> >  )
> 
> What exactly are you trying to do here? You don't have a 
> grouping factor, so
> 
> why is just 
> 
> xyplot(Y ~ X | Block, data = resultdata, 
>        xlab="X", ylab="Y", cex = 2)
> 
> not OK ?
> 
> 
> >
> --------------------------------------------------------------
> -------------
> >- -------------------------------
> >
> > 2.For the latest formula I would also like to change the 
> resultdata$Block
> > label by the corresponding "Block x".
> 
> I'm not sure what you mean. If you are talking about the 
> Labels in the strip
> 
> above each panel, that would come from the levels of the 
> Block variable. So,
> 
> the Block variable has to be a factor, and it should have 
> levels "Block 1" 
> ... "Block 6". See ?factor for how to do that.
> 
> 
> >
> --------------------------------------------------------------
> -------------
> >- -------------------------------
> >
> > 3.I finally would like to save my plot as "jpg" files under 
> Linux but I
> > loose the color.
> 
> How did you try to do this ?
> 
> Deepayan
> 
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