Re: [R] Multiline and grouping in R

From: <Bill.Venables_at_csiro.au>
Date: Wed, 30 Jun 2010 11:19:37 +1000

> require(lattice)

Loading required package: lattice
> xyplot(CASES ~ YEAR | AREA, data = t, type = "b")
> xyplot(CASES ~ YEAR, data = t, type = "b", groups = AREA)
  

-----Original Message-----
From: r-help-bounces_at_r-project.org [mailto:r-help-bounces_at_r-project.org] On Behalf Of Pablo Cerdeira Sent: Wednesday, 30 June 2010 10:42 AM
To: r-help_at_r-project.org
Subject: [R] Multiline and grouping in R

Hi All,

this is my first mail here.

I'm trying to plot a multiline chart grouping values with no success. I have read a lot in the official Wiki and also searched via Google, but I did not find anything.

I'm importing some data from a cvs file. Here is a sample:

YEAR,AREA,CASES
1988,CONTRACTS,286
1988,INTERNATIONAL,189
1988,FAMILY,385
1988,TAXATION,177
1989,CONTRACTS,233
1989,INTERNATIONAL,431
1989,FAMILY,425
1989,TAXATION,201
1990,CONTRACTS,190
1990,INTERNATIONAL,302
1990,FAMILY,303
1990,TAXATION,209

...

"t <- read.csv("file.csv", header=TRUE)"

So far so good...

But the problem is: I'd like to create a multiline plot, one line per AREA, showing the evolution of the number of CASES per YEAR.

I know how to do it in Excel, using a Pivot Table. But I'm trying hard to do the same with R but I have no idea on how to do it.

Can someone help me?

Thanks in advanced

-- 
Pablo de Camargo Cerdeira
pablo.cerdeira_at_gmail.com
+55 (21) 3799-6065

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