[R] Reshape

[Michael Bedward]

Hi Toby,

I think this should work...

reshape(dat, v.names=c("weight"), idvar=c("valley", "plot", "trt"),
timevar="fame", direction="wide")

Michael


On 28 September 2010 12:17, Toby Gass <tobygass at warnercnr.colostate.edu> wrote:
> Hello, helpeRs,
>
> I've been trying, unsuccessfully, to change a dataframe from long to
> wide format using reshape (the original).  I would appreciate it if
> someone could demonstrate the correct syntax.  The script below will
> create a toy example.  The new wide data should have a column name
> for each unique entry in the "fame" column.   Under each column
> should be either the appropriate weight or na, if there is no match.
> Thus, the end product should have column names:
>
> valley  plot   trt   18w   16iso  12:0, etc.
>
> Here is the toy script for the starting data in long form:
>
> dat <- data.frame(fame =  gl(4,1,10, labels = c( "18w", "16iso",
> "12:0", "16w")), valley = gl(2,6,10, labels = c("H", "M")), plot =
> gl(5, 2, 10), trt = gl(2,1,10, labels = c("e", "g")), weight =
> 1000*runif(10, 0, 1))
>
> Thank you for your assistance.
>
> Toby
>
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