[R] Adding average into a matplot?

[Bill.Venables at csiro.au]

Dear Kingfisher,

Try this.

X <- as.matrix(read.table(textConnection("
 500  500  500  500
 516  519  509  508
 559  573  556  566
 613  650  611  633
 676  714  667  716
 751  808  742  809
 816  890  823  879")))
 
Year <- 2000 + 1:7

matplot(Year, X, type = "l", pch = 3, col = "grey")
lines(Year, rowMeans(X), col = "red", lwd = 2)

 


Bill Venables
CSIRO Laboratories
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mailto:Bill.Venables at csiro.au
http://www.cmis.csiro.au/bill.venables/ 

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of -Halcyon-
Sent: Friday, 11 April 2008 1:06 AM
To: r-help at r-project.org
Subject: [R] Adding average into a matplot?


Hi all,


I have a matrix which is filled with simulation results for several
years.
Example of an output (7 years, 4 simulations):

     [,1] [,2] [,3] [,4] 
[1,]  500  500  500  500  
[2,]  516  519  509  508  
[3,]  559  573  556  566  
[4,]  613  650  611  633  
[5,]  676  714  667  716  
[6,]  751  808  742  809 
[7,]  816  890  823  879  

My matplot gives me 4 lines, but I would like to add a line with the
averages of each year for all simulations. Can anyone help me with this?

Thanks in advance!

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