[R] how to plot several curves in the same frame

[Gabor Grothendieck]

On Fri, Feb 3, 2012 at 5:05 AM, ikuzar <razuki at hotmail.fr> wrote:
> Hello,
> I'd like to know how to plot several curves in the same frame (1curve =
> 1line=1day).
> For instance (csv file):
>
> 2012-02-01 01:00:00; 2100
> 2012-02-01 02:00:00; 2200
> ...
> 2012-02-01 23:00:00; 2500
> 2012-02-02 01:00:00; 1000
> 2012-02-02 02:00:00; 1500
> ...
> 2012-02-02 23:00:00; 1700
>
> Here, I have to plot 2 curves in the same frame: 1 for 2012-02-01 (on the
> first line) and 1 for 2012-02-02 (on the second)
>

Assuming you want to plot the numbers against time for each day:

Lines <- "2012-02-01 01:00:00; 2100
2012-02-01 02:00:00; 2200
2012-02-01 23:00:00; 2500
2012-02-02 01:00:00; 1000
2012-02-02 02:00:00; 1500
2012-02-02 23:00:00; 1700"

library(zoo)
library(chron)

procTime <- function(x) times(sub(";", "", x))
z <- read.zoo(text = Lines, split = 1, index = 2, FUN = procTime)

cols <- rainbow(ncol(z))
plot(z, screen = 1, col = cols)
legend("bottomright", leg = colnames(z), col = cols, lty = 1)

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