[R] Line plot using xyplot function in lattice package

[Sundar Dorai-Raj]

Ghosh, Sandeep wrote on 3/17/2005 1:25 PM:
> Hi All,
> 
> For the following data when I use xyplot in package lattice the intervals are in the order of 2, 24, 8, but instead I want them to be in the order 2, 8, 24.
> 
>   Treatment Interval  value
>   A          2  		0.448
>   A	       24		1.85
>   A          8  		1.166
>   B          2  		1.074
>   B	       24		1.5
>   B          8  		1.065
>   C  	       2  		0.854
>   C          8  		0.589
> 
> The R script is xyplot(value ~ Interval, data=studyData, type='b', groups = Treatment,
> 
> Is there a way in xyplot to specify the order?. 
> 
> -Sandeep


Hi Sandeep,

You can make Interval an ordered variable:

studyData$Interval <- ordered(studyData$Interval, c("2", "24", "8"))
xyplot(value ~ Interval, data=studyData, type='b', groups = Treatment)

--sundar