[R] multiple line plots

[Marc Schwartz]

On Wed, 2005-10-05 at 22:19 +1000, sosman wrote:
> I have some data in a CSV file:
> 
> time,pos,t,tl
> 15:23:44:350,M1_01,4511,1127
> 15:23:44:350,M1_02,4514,1128
> 15:23:44:350,M1_03,4503,1125
> ...
> 15:23:44:491,M2_01,4500,1125
> 15:23:44:491,M2_02,4496,1124
> 15:23:44:491,M2_03,4516,1129
> ...
> 15:23:44:710,M3_01,4504,1126
> 15:23:44:710,M3_02,4516,1129
> 15:23:44:710,M3_03,4498,1124
> ...
> 
> Each pos (eg M1_01) is an independent time series.  I would like to plot 
> each time series as lines on a single plot and I wondered if there was 
> something more straight forward than I was attempting.
> 
> I got as far as:
> 
> fname = 't100.csv'
> t = read.csv(fname)
> tpos = split(t, t$pos)
> plot(tpos[["M1_01"]]$t, type='l')
> for (p in names(tpos)) {
>      lines(tpos[[p]]$t)
> }
> 
> which seems to work but then I got stuck on how to make each line a 
> different colour and figured that there might a be a one liner R command 
> to do what I want.
> 
> Any tips would be appreciated.


See the examples in ?plot.ts for some approaches.

You will need to review ?ts to create time series objects from your data
to be used in plot.ts().

Another approach, which is not specific to time series, is ?matplot.

HTH,

Marc Schwartz