[R] plot(): I want to display dates on X-axis.

[Michael Toews]

>
> e.g. dat
>
>                  [,1]                        dat[,2]
>
> [1,]            300                       20060101
> [2,]            257                       20060102
> [3,]            320                       20060103
> [4,]            311                       20060104
> [5,]            297                       20060105
> [6,]            454                       20060106
> [7,]            360                       20060107
> [8,]            307                       20060108
> ....
>   
This looks like a matrix ... not a data frame. You defiantly want a data 
frame. So lets say you have:
dat <- matrix(c(round(rnorm(8)*100+400),20060101:20060108),ncol=2)

#convert it:
dat <- as.data.frame(dat)

#determine the dates:
dat$date <- as.Date(as.character(dat$V2),"%Y%m%d")

#plot it:
plot(V1 ~ date, dat)