Deepayan,
It is empty.
> subset(dat11, Pri_No %in% c(1,2))
[1] tally scape numid bbContag bbED
[6] bbENN_MN bbLPI bbLSI bbPAFRAC bbPD
[11] bbPROX_MN pfor year extent bi_ca
[16] r ex_bin PriNo pri1234 pri_ex
[21] sc_ex Sc_ex_pri sc_recov recov_bica sc_reco_bica
[26] sc_ec_p1234 Pri_No id_no RecovUnit Max.est
[31] X1960 X1970 X1980 X1990 X1995
[36] X2000 X2005 X1 X2 X3
[41] X4 X5 X6 X7 slope
[46] std.slope CI.SLOPe X.CI.SLOPE
<0 rows> (or 0-length row.names)
Somehow my Pri_No got reclassified to TRUE and FALSE. I did it over and it
works. Sorry about the waste of time. But it helped me out.
Thanks,
Michael Just
On Wed, Oct 8, 2008 at 7:37 PM, Deepayan Sarkar
<[EMAIL PROTECTED]>wrote:
> On Wed, Oct 8, 2008 at 1:56 PM, Michael Just <[EMAIL PROTECTED]> wrote:
> > Hello, this code below was from a helpful R-help user.
> >
> > dat <- read.csv("Resid_fix2.csv", sep="," , header=T)
> > dat11 <- dat[1:413,]
> > # convert ambiguous columns to factors:
> > dat11$Pri_No <- factor(dat11$Pri_No)
> > dat11$RecovUnit <- factor(dat11$RecovUnit)
> > # plot:
> > require(lattice)
> > bwplot(bbED~ Pri_No | RecovUnit, data=dat11, as.table=TRUE,
> layout=c(4,1))
> >
> > This works, but I am trying to do this:
> >> bwplot(bbED~ Pri_No | RecovUnit, data=dat11, subset = (Pri_No %in%
> > c(1,2)), as.table=TRUE, layout=c(2,1))
> > Error in limits.and.aspect(prepanel.default.bwplot, prepanel = prepanel,
> :
> > need at least one panel
> >
> > How can I choose only two groups from 'Pri_No'?
>
> It's hard to say without a reproducible example. Your error message
> suggests that your subsetting operation results in an empty dataset.
> What do you get with
>
> subset(dat11, Pri_No %in% c(1,2))
>
> ?
>
> -Deepayan
>
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